diff --git a/packages/eui/changelogs/upcoming/9985.md b/packages/eui/changelogs/upcoming/9985.md
new file mode 100644
index 000000000000..1ef55758cff0
--- /dev/null
+++ b/packages/eui/changelogs/upcoming/9985.md
@@ -0,0 +1,3 @@
+**Bug fixes**
+
+- Fixed `EuiPopoverTitle` and `EuiPopoverFooter` backgrounds not following the popover panel's corner radius
diff --git a/packages/eui/src/components/popover/popover_footer.styles.ts b/packages/eui/src/components/popover/popover_footer.styles.ts
index ca494294c417..5520a9aeb383 100644
--- a/packages/eui/src/components/popover/popover_footer.styles.ts
+++ b/packages/eui/src/components/popover/popover_footer.styles.ts
@@ -31,9 +31,13 @@ export const euiPopoverFooterStyles = (euiThemeContext: UseEuiTheme) => {
             : euiTheme.components.popoverFooterBorderColor
         }`
       )}
+      /* Match the panel radius so footer backgrounds don't square off the corners.
+         Avoid overflow: hidden on the panel — it clips the filter shadow and arrow. */
+      ${logicalCSS('border-bottom-left-radius', euiTheme.border.radius.medium)}
+      ${logicalCSS('border-bottom-right-radius', euiTheme.border.radius.medium)}
     `,
     // If the popover's containing panel has padding applied,
-    // ensure the title expands to cover that padding via negative margins
+    // ensure the footer expands to cover that padding via negative margins
     panelPaddingSizes: {
       none: css``,
       xs: css`
diff --git a/packages/eui/src/components/popover/popover_title.styles.ts b/packages/eui/src/components/popover/popover_title.styles.ts
index c47e4a6d88dd..5e14614677dd 100644
--- a/packages/eui/src/components/popover/popover_title.styles.ts
+++ b/packages/eui/src/components/popover/popover_title.styles.ts
@@ -24,6 +24,10 @@ export const euiPopoverTitleStyles = (euiThemeContext: UseEuiTheme) => {
     euiPopoverTitle: css`
       ${euiTitle(euiThemeContext, 'xxs')}
       ${logicalCSS('border-bottom', euiTheme.border.thin)}
+      /* Match the panel radius so title backgrounds don't square off the corners.
+         Avoid overflow: hidden on the panel — it clips the filter shadow and arrow. */
+      ${logicalCSS('border-top-left-radius', euiTheme.border.radius.medium)}
+      ${logicalCSS('border-top-right-radius', euiTheme.border.radius.medium)}
     `,
     // If the popover's containing panel has padding applied,
     // ensure the title expands to cover that padding via negative margins