diff --git a/packages/eui/changelogs/upcoming/8061.md b/packages/eui/changelogs/upcoming/8061.md
new file mode 100644
index 00000000000..0b64d936818
--- /dev/null
+++ b/packages/eui/changelogs/upcoming/8061.md
@@ -0,0 +1,4 @@
+**Bug fixes**
+
+- Fixed inputs not taking the whole width when passing `fullWidth` as `true` to EuiDatePickerRange component
+
diff --git a/packages/eui/src/components/date_picker/date_picker_range.styles.ts b/packages/eui/src/components/date_picker/date_picker_range.styles.ts
index b2a63310649..49aec5e60d0 100644
--- a/packages/eui/src/components/date_picker/date_picker_range.styles.ts
+++ b/packages/eui/src/components/date_picker/date_picker_range.styles.ts
@@ -19,6 +19,11 @@ export const euiDatePickerRangeStyles = {
     .euiDatePicker {
       ${logicalCSS('height', '100%')}
     }
+
+    /* Needed for the fullWidth prop: makes inputs take the whole available space */
+    .euiPopover {
+      flex: 1;
+    }
   `,
 };