diff --git a/.changeset/thirty-jobs-reflect.md b/.changeset/thirty-jobs-reflect.md
new file mode 100644
index 0000000000..dffa627907
--- /dev/null
+++ b/.changeset/thirty-jobs-reflect.md
@@ -0,0 +1,5 @@
+---
+"sit-onyx": minor
+---
+
+feat: implement `OnyxAlertDialog` component
diff --git a/packages/sit-onyx/playwright/snapshots/components/OnyxAlertDialog/breakpoint-2xs-edge-linux.png b/packages/sit-onyx/playwright/snapshots/components/OnyxAlertDialog/breakpoint-2xs-edge-linux.png
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index 629d95e192..5428961d18 100644
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diff --git a/packages/sit-onyx/playwright/snapshots/components/OnyxNavBar/modules/OnyxColorSchemeDialog/Color-scheme-dialog-webkit-linux.png b/packages/sit-onyx/playwright/snapshots/components/OnyxNavBar/modules/OnyxColorSchemeDialog/Color-scheme-dialog-webkit-linux.png
index 1c189bb9b8..bb8e78e7da 100644
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diff --git a/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.ct.tsx b/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.ct.tsx
new file mode 100644
index 0000000000..74d9758f66
--- /dev/null
+++ b/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.ct.tsx
@@ -0,0 +1,37 @@
+import { ONYX_BREAKPOINTS } from "@sit-onyx/shared/breakpoints";
+import { expect, test } from "../../playwright/a11y";
+import TestWrapperCt from "./TestWrapper.ct.vue";
+
+test.describe("Screenshot tests", () => {
+  for (const breakpoint of ["2xs", "xs", "sm"] as const) {
+    test(`Screenshot ${breakpoint}`, async ({ mount, makeAxeBuilder, page }) => {
+      await page.setViewportSize({ width: ONYX_BREAKPOINTS[breakpoint] + 1, height: 256 });
+
+      // ARRANGE
+      await mount(<TestWrapperCt />);
+
+      // ASSERT
+      await expect(page).toHaveScreenshot(`breakpoint-${breakpoint}.png`);
+
+      // ACT
+      const accessibilityScanResults = await makeAxeBuilder().analyze();
+
+      // ASSERT
+      expect(accessibilityScanResults.violations).toEqual([]);
+    });
+  }
+});
+
+test("should behave correctly", async ({ mount }) => {
+  let closeEventCount = 0;
+
+  // ARRANGE
+  const component = await mount(<TestWrapperCt onClose={() => closeEventCount++} />);
+  const closeButton = component.getByRole("button", { name: "Close dialog" });
+
+  // ACT
+  await closeButton.click();
+
+  // ASSERT
+  expect(closeEventCount).toBe(1);
+});
diff --git a/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.stories.ts b/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.stories.ts
new file mode 100644
index 0000000000..c378adda82
--- /dev/null
+++ b/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.stories.ts
@@ -0,0 +1,55 @@
+import circleAttention from "@sit-onyx/icons/circle-attention.svg?raw";
+import type { Meta, StoryObj } from "@storybook/vue3";
+import { h, ref, watchEffect } from "vue";
+import OnyxButton from "../OnyxButton/OnyxButton.vue";
+import OnyxAlertDialog from "./OnyxAlertDialog.vue";
+
+/**
+ * The alert dialog is used to provide important information to the user.
+ * Note that this dialog is an [alert dialog](https://www.w3.org/WAI/ARIA/apg/patterns/alertdialog/).
+ * It interrupts the user's workflow to communicate an important message and acquires a response, e.g. a delete confirmation.
+ *
+ * You can also implement a custom dialog using the [OnyxDialog](/docs/support-dialog--docs) component.
+ */
+const meta: Meta<typeof OnyxAlertDialog> = {
+  title: "Feedback/AlertDialog",
+  component: OnyxAlertDialog,
+  argTypes: {
+    default: { control: { type: "text" } },
+  },
+};
+
+export default meta;
+type Story = StoryObj<typeof OnyxAlertDialog>;
+
+export const Default = {
+  args: {
+    label: "Confirm deletion",
+    default:
+      "Are you sure that you want to delete the selected item? This action can not be reverted.",
+    icon: {
+      icon: circleAttention,
+      color: "danger",
+    },
+    actions: [
+      h(OnyxButton, { label: "Cancel", color: "neutral", mode: "plain", autofocus: true }),
+      h(OnyxButton, { label: "Delete", color: "danger" }),
+    ],
+  },
+  decorators: [
+    (story, ctx) => ({
+      components: { story, OnyxButton },
+      setup: () => {
+        const isOpen = ref(false);
+        watchEffect(() => {
+          ctx.args.open = isOpen.value;
+        });
+        return { isOpen };
+      },
+      template: `<div>
+        <OnyxButton label="Show alert modal" @click="isOpen = true" />
+        <story :open="isOpen" @close="isOpen = false;" />
+      </div>`,
+    }),
+  ],
+} satisfies Story;
diff --git a/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.vue b/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.vue
new file mode 100644
index 0000000000..1c21add750
--- /dev/null
+++ b/packages/sit-onyx/src/components/OnyxAlertDialog/OnyxAlertDialog.vue
@@ -0,0 +1,129 @@
+<script lang="ts" setup>
+import xSmall from "@sit-onyx/icons/x-small.svg?raw";
+import { useDensity } from "../../composables/density";
+import { injectI18n } from "../../i18n";
+import OnyxDialog from "../OnyxDialog/OnyxDialog.vue";
+import OnyxHeadline from "../OnyxHeadline/OnyxHeadline.vue";
+import OnyxIcon from "../OnyxIcon/OnyxIcon.vue";
+import OnyxSystemButton from "../OnyxSystemButton/OnyxSystemButton.vue";
+import type { OnyxAlertDialogProps } from "./types";
+
+const props = defineProps<OnyxAlertDialogProps>();
+
+const emit = defineEmits<{
+  /**
+   * Emitted when the dialog should be closed.
+   */
+  close: [];
+}>();
+
+defineSlots<{
+  /**
+   * Dialog content.
+   */
+  default(): unknown;
+  /**
+   * Optional slot to override the headline with custom content.
+   */
+  headline?(bindings: Pick<OnyxAlertDialogProps, "label">): unknown;
+  /**
+   * Slot to display custom actions at the bottom of the dialog, e.g. buttons for confirm or cancelling the current user workflow.
+   * For accessibility purposes it is recommended to set autofocus on one button, preferably the "cancel" button if one exists.
+   *
+   * @example
+   * ```vue
+   * <OnyxButton label="Cancel" color="neutral" mode="plain" autofocus />
+   * ```
+   */
+  actions?(): unknown;
+}>();
+
+const { t } = injectI18n();
+const { densityClass } = useDensity(props);
+</script>
+
+<template>
+  <OnyxDialog
+    :class="['onyx-alert-dialog', densityClass]"
+    v-bind="props"
+    modal
+    alert
+    @close="emit('close')"
+  >
+    <div class="onyx-alert-dialog__content">
+      <OnyxIcon v-if="props.icon" class="onyx-alert-dialog__icon" v-bind="props.icon" size="64px" />
+
+      <div>
+        <div class="onyx-alert-dialog__headline">
+          <slot name="headline" :label="props.label">
+            <OnyxHeadline is="h2">{{ props.label }}</OnyxHeadline>
+          </slot>
+
+          <OnyxSystemButton
+            class="onyx-alert-dialog__close"
+            :label="t('dialog.close')"
+            :icon="xSmall"
+            @click="emit('close')"
+          />
+        </div>
+
+        <div class="onyx-alert-dialog__body onyx-truncation">
+          <slot></slot>
+        </div>
+      </div>
+    </div>
+
+    <div class="onyx-alert-dialog__actions">
+      <slot name="actions"></slot>
+    </div>
+  </OnyxDialog>
+</template>
+
+<style lang="scss">
+@use "../../styles/mixins/layers.scss";
+@use "../../styles/breakpoints.scss";
+
+.onyx-alert-dialog {
+  @include layers.component() {
+    --max-width: 26rem;
+
+    &__content {
+      max-width: var(--max-width);
+      display: flex;
+      align-items: center;
+      gap: var(--onyx-density-sm);
+    }
+
+    &__headline {
+      display: flex;
+      align-items: flex-start;
+      justify-content: space-between;
+      gap: var(--onyx-density-xs);
+    }
+
+    &__body {
+      margin-top: var(--onyx-density-sm);
+      white-space: pre-line;
+    }
+
+    &__actions {
+      margin-top: var(--onyx-density-md);
+      display: flex;
+      align-items: center;
+      justify-content: flex-end;
+      gap: var(--onyx-density-xs);
+      max-width: var(--max-width);
+    }
+
+    &__icon {
+      @include breakpoints.screen(max, md) {
+        --icon-size: 3rem;
+      }
+
+      @include breakpoints.screen(max, sm) {
+        --icon-size: 2rem;
+      }
+    }
+  }
+}
+</style>
diff --git a/packages/sit-onyx/src/components/OnyxAlertDialog/TestWrapper.ct.vue b/packages/sit-onyx/src/components/OnyxAlertDialog/TestWrapper.ct.vue
new file mode 100644
index 0000000000..8e27800195
--- /dev/null
+++ b/packages/sit-onyx/src/components/OnyxAlertDialog/TestWrapper.ct.vue
@@ -0,0 +1,25 @@
+<script lang="ts" setup>
+import circleAttention from "@sit-onyx/icons/circle-attention.svg?raw";
+import OnyxButton from "../OnyxButton/OnyxButton.vue";
+import OnyxAlertDialog from "./OnyxAlertDialog.vue";
+
+const emit = defineEmits<{
+  close: [];
+}>();
+</script>
+
+<template>
+  <OnyxAlertDialog
+    label="Confirm deletion"
+    :icon="{ icon: circleAttention, color: 'danger' }"
+    open
+    @close="emit('close')"
+  >
+    Are you sure that you want to delete the selected item? This action can not be reverted.
+
+    <template #actions>
+      <OnyxButton label="Cancel" color="neutral" autofocus />
+      <OnyxButton label="Delete" color="danger" />
+    </template>
+  </OnyxAlertDialog>
+</template>
diff --git a/packages/sit-onyx/src/components/OnyxAlertDialog/types.ts b/packages/sit-onyx/src/components/OnyxAlertDialog/types.ts
new file mode 100644
index 0000000000..d9cb35c761
--- /dev/null
+++ b/packages/sit-onyx/src/components/OnyxAlertDialog/types.ts
@@ -0,0 +1,9 @@
+import type { OnyxDialogProps } from "../OnyxDialog/types";
+import type { OnyxIconProps } from "../OnyxIcon/types";
+
+export type OnyxAlertDialogProps = Omit<OnyxDialogProps, "modal" | "alert"> & {
+  /**
+   * Optional icon to show.
+   */
+  icon?: Omit<OnyxIconProps, "size">;
+};
diff --git a/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.stories.ts b/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.stories.ts
index d63ced5557..1f4b6cf6c1 100644
--- a/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.stories.ts
+++ b/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.stories.ts
@@ -8,7 +8,7 @@ import OnyxDialog from "./OnyxDialog.vue";
  * If using the `modal` mode, the primary page content will not be interactive.
  */
 const meta: Meta<typeof OnyxDialog> = {
-  title: "Feedback/Dialog",
+  title: "Support/Dialog",
   component: OnyxDialog,
   argTypes: {
     default: { control: { type: "text" } },
diff --git a/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.vue b/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.vue
index 772ef58da0..dcd16d394c 100644
--- a/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.vue
+++ b/packages/sit-onyx/src/components/OnyxDialog/OnyxDialog.vue
@@ -82,7 +82,7 @@ watch(
     border-radius: var(--onyx-radius-md);
     font-family: var(--onyx-font-family);
     color: var(--onyx-color-text-icons-neutral-intense);
-    padding: var(--onyx-density-lg);
+    padding: var(--onyx-density-md) var(--onyx-density-lg);
     background-color: var(--onyx-color-base-background-blank);
     overflow: auto;
     z-index: var(--onyx-z-index-page-overlay);
@@ -104,6 +104,7 @@ watch(
 
     &:modal {
       z-index: var(--onyx-z-index-app-overlay);
+      box-shadow: var(--onyx-shadow-soft-bottom);
     }
   }
 }
diff --git a/packages/sit-onyx/src/i18n/locales/de-DE.json b/packages/sit-onyx/src/i18n/locales/de-DE.json
index e84b2ba371..5a1f1f75f1 100644
--- a/packages/sit-onyx/src/i18n/locales/de-DE.json
+++ b/packages/sit-onyx/src/i18n/locales/de-DE.json
@@ -128,5 +128,8 @@
   },
   "input": {
     "clear": "Eingabe löschen"
+  },
+  "dialog": {
+    "close": "Dialog schließen"
   }
 }
diff --git a/packages/sit-onyx/src/i18n/locales/en-US.json b/packages/sit-onyx/src/i18n/locales/en-US.json
index d3eaad2fbe..de7d9c0772 100644
--- a/packages/sit-onyx/src/i18n/locales/en-US.json
+++ b/packages/sit-onyx/src/i18n/locales/en-US.json
@@ -137,5 +137,8 @@
   },
   "input": {
     "clear": "Clear input"
+  },
+  "dialog": {
+    "close": "Close dialog"
   }
 }
diff --git a/packages/sit-onyx/src/index.ts b/packages/sit-onyx/src/index.ts
index 07271977e7..7b06aa1c36 100644
--- a/packages/sit-onyx/src/index.ts
+++ b/packages/sit-onyx/src/index.ts
@@ -2,6 +2,9 @@ import "./styles/index.scss";
 
 export { ONYX_BREAKPOINTS, type OnyxBreakpoint } from "@sit-onyx/shared/breakpoints";
 
+export { default as OnyxAlertDialog } from "./components/OnyxAlertDialog/OnyxAlertDialog.vue";
+export * from "./components/OnyxAlertDialog/types";
+
 export { default as OnyxAppLayout } from "./components/OnyxAppLayout/OnyxAppLayout.vue";
 export * from "./components/OnyxAppLayout/types";