diff --git a/.changeset/chilled-walls-cheer.md b/.changeset/chilled-walls-cheer.md
new file mode 100644
index 00000000000..f8fd4924215
--- /dev/null
+++ b/.changeset/chilled-walls-cheer.md
@@ -0,0 +1,5 @@
+---
+"@primer/react": patch
+---
+
+Show `Tooltip` on close button in `Dialog`
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Dev-With-Css-light-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Dev-With-Css-light-colorblind-linux.png
index ffc1019a844..2272a1571c2 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-colorblind-linux.png
index e9df71e78bf..75cd2967d4a 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-dimmed-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-dimmed-linux.png
index 898c4156a07..db0b0a67c96 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-high-contrast-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-high-contrast-linux.png
index fb174f1d6f7..21294f14b09 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-linux.png
index e9df71e78bf..75cd2967d4a 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-tritanopia-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-dark-tritanopia-linux.png
index e9df71e78bf..75cd2967d4a 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-colorblind-linux.png
index 455bbb65e9f..3089b75210f 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-high-contrast-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-high-contrast-linux.png
index 7b798c5100b..a5ac05340ae 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-linux.png
index 455bbb65e9f..3089b75210f 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-tritanopia-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-bottom-light-tritanopia-linux.png
index 455bbb65e9f..3089b75210f 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-colorblind-linux.png
index e9df71e78bf..75cd2967d4a 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-dimmed-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-dimmed-linux.png
index 898c4156a07..db0b0a67c96 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-high-contrast-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-high-contrast-linux.png
index fb174f1d6f7..21294f14b09 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-high-contrast-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-high-contrast-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-linux.png
index e9df71e78bf..75cd2967d4a 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-tritanopia-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-dark-tritanopia-linux.png
index e9df71e78bf..75cd2967d4a 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-colorblind-linux.png
index 455bbb65e9f..3089b75210f 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-high-contrast-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-high-contrast-linux.png
index 7b798c5100b..a5ac05340ae 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-linux.png
index 455bbb65e9f..3089b75210f 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-tritanopia-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-fullscreen-light-tritanopia-linux.png
index 455bbb65e9f..3089b75210f 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-colorblind-linux.png
index fb63a4b582d..51e05aab9f1 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-dimmed-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-dimmed-linux.png
index d2137b3496b..c2ba103a253 100644
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diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-high-contrast-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-high-contrast-linux.png
index a83b9bc0f3e..946fb2ea738 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-high-contrast-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-high-contrast-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-linux.png
index fb63a4b582d..51e05aab9f1 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-tritanopia-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-tritanopia-linux.png
index fb63a4b582d..51e05aab9f1 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-tritanopia-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-dark-tritanopia-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-colorblind-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-colorblind-linux.png
index 1d70c59b77c..2a1ae390420 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-colorblind-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-colorblind-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-high-contrast-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-high-contrast-linux.png
index b35f1b4204e..78b6ba5294e 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-high-contrast-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-high-contrast-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-linux.png
index 1d70c59b77c..2a1ae390420 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-linux.png differ
diff --git a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-tritanopia-linux.png b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-tritanopia-linux.png
index 1d70c59b77c..2a1ae390420 100644
Binary files a/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-tritanopia-linux.png and b/.playwright/snapshots/components/Dialog.test.ts-snapshots/Dialog-Position-sidesheet-light-tritanopia-linux.png differ
diff --git a/packages/react/.storybook/storybook.css b/packages/react/.storybook/storybook.css
index fd26ca2d071..d0f4ca72f5a 100644
--- a/packages/react/.storybook/storybook.css
+++ b/packages/react/.storybook/storybook.css
@@ -74,6 +74,10 @@
   border: var(--borderWidth-thin) solid var(--borderColor-sponsors-emphasis) !important;
 }
 
+.testCustomAnimation {
+  animation: none !important;
+}
+
 .testCustomClassnameMono {
   font-family: var(--fontStack-monospace) !important;
 }
diff --git a/packages/react/src/Dialog/Dialog.dev.stories.tsx b/packages/react/src/Dialog/Dialog.dev.stories.tsx
index 13060b3f0d9..6248c6c7c60 100644
--- a/packages/react/src/Dialog/Dialog.dev.stories.tsx
+++ b/packages/react/src/Dialog/Dialog.dev.stories.tsx
@@ -83,7 +83,7 @@ export const WithCss = ({width, height, subtitle}: DialogStoryProps) => {
             {buttonType: 'danger', content: 'Delete the universe', onClick: onDialogClose},
             {buttonType: 'primary', content: 'Proceed'},
           ]}
-          className="testCustomClassnameBorder"
+          className="testCustomClassnameBorder testCustomAnimation"
         >
           {lipsum}
         </Dialog>
@@ -137,7 +137,7 @@ export const WithSx = ({width, height, subtitle}: DialogStoryProps) => {
             {buttonType: 'danger', content: 'Delete the universe', onClick: onDialogClose},
             {buttonType: 'primary', content: 'Proceed'},
           ]}
-          sx={{borderColor: 'accent.emphasis', borderWidth: '1px', borderStyle: 'solid'}}
+          sx={{borderColor: 'accent.emphasis', borderWidth: '1px', borderStyle: 'solid', animation: 'none !important'}}
         >
           {lipsum}
         </Dialog>
@@ -199,7 +199,7 @@ export const WithSxAndCss = ({width, height, subtitle}: DialogStoryProps) => {
             {buttonType: 'danger', content: 'Delete the universe', onClick: onDialogClose},
             {buttonType: 'primary', content: 'Proceed'},
           ]}
-          sx={{borderColor: 'border.accent', borderWidth: '1px', borderStyle: 'solid'}}
+          sx={{borderColor: 'border.accent', borderWidth: '1px', borderStyle: 'solid', animation: 'none !important'}}
           className="testCustomClassnameBorder"
         >
           {lipsum}
diff --git a/packages/react/src/Dialog/Dialog.module.css b/packages/react/src/Dialog/Dialog.module.css
index 444df0b3510..89085c7110a 100644
--- a/packages/react/src/Dialog/Dialog.module.css
+++ b/packages/react/src/Dialog/Dialog.module.css
@@ -119,14 +119,14 @@
   }
 
   @media screen and (prefers-reduced-motion: no-preference) {
-    animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+    animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
   }
 
   &[data-position-regular='center'] {
     border-radius: var(--borderRadius-large, var(--borderRadius-large));
 
     @media screen and (prefers-reduced-motion: no-preference) {
-      animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+      animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
     }
   }
 
@@ -138,7 +138,7 @@
     border-bottom-left-radius: 0;
 
     @media screen and (prefers-reduced-motion: no-preference) {
-      animation: Overlay--motion-slideInRight 0.25s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+      animation: Overlay--motion-slideInRight 0.25s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
     }
   }
 
@@ -193,7 +193,7 @@
       border-bottom-left-radius: 0;
 
       @media screen and (prefers-reduced-motion: no-preference) {
-        animation: Overlay--motion-slideUp 0.25s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+        animation: Overlay--motion-slideUp 0.25s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
       }
     }
 
@@ -206,7 +206,7 @@
       flex-grow: 1;
 
       @media screen and (prefers-reduced-motion: no-preference) {
-        animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+        animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
       }
     }
   }
diff --git a/packages/react/src/Dialog/Dialog.tsx b/packages/react/src/Dialog/Dialog.tsx
index f359932bf8b..25d04a75b8b 100644
--- a/packages/react/src/Dialog/Dialog.tsx
+++ b/packages/react/src/Dialog/Dialog.tsx
@@ -271,14 +271,14 @@ const StyledDialog = toggleStyledComponent(
     opacity: 1;
 
     @media screen and (prefers-reduced-motion: no-preference) {
-      animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+      animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
     }
 
     &[data-position-regular='center'] {
       border-radius: var(--borderRadius-large, 0.75rem);
 
       @media screen and (prefers-reduced-motion: no-preference) {
-        animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+        animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
       }
     }
 
@@ -290,7 +290,7 @@ const StyledDialog = toggleStyledComponent(
       border-bottom-left-radius: 0;
 
       @media screen and (prefers-reduced-motion: no-preference) {
-        animation: Overlay--motion-slideInRight 0.25s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+        animation: Overlay--motion-slideInRight 0.25s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
       }
     }
 
@@ -323,7 +323,7 @@ const StyledDialog = toggleStyledComponent(
         border-bottom-left-radius: 0;
 
         @media screen and (prefers-reduced-motion: no-preference) {
-          animation: Overlay--motion-slideUp 0.25s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+          animation: Overlay--motion-slideUp 0.25s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
         }
       }
 
@@ -336,7 +336,7 @@ const StyledDialog = toggleStyledComponent(
         flex-grow: 1;
 
         @media screen and (prefers-reduced-motion: no-preference) {
-          animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 0s 1 normal none running;
+          animation: Overlay--motion-scaleFade 0.2s cubic-bezier(0.33, 1, 0.68, 1) 1ms 1 normal none running;
         }
       }
     }
@@ -677,10 +677,7 @@ const Buttons: React.FC<React.PropsWithChildren<{buttons: DialogButtonProps[]}>>
 }
 
 const CloseButton: React.FC<React.PropsWithChildren<{onClose: () => void}>> = ({onClose}) => {
-  return (
-    // eslint-disable-next-line primer-react/a11y-remove-disable-tooltip
-    <IconButton unsafeDisableTooltip={true} icon={XIcon} aria-label="Close" onClick={onClose} variant="invisible" />
-  )
+  return <IconButton icon={XIcon} aria-label="Close" onClick={onClose} variant="invisible" />
 }
 
 /**