diff --git a/packages/library/src/components/index.ts b/packages/library/src/components/index.ts
index b4fe48d..d75a3c1 100644
--- a/packages/library/src/components/index.ts
+++ b/packages/library/src/components/index.ts
@@ -8,3 +8,4 @@ export { Switch } from './ui/switch'
 export { Badge, badgeVariants } from './ui/badge'
 export { Checkbox } from './ui/checkbox'
 export { CheckboxGroup } from './ui/checkbox-group'
+export { RadioGroup, RadioGroupItem } from './ui/radio-group'
diff --git a/packages/library/src/components/ui/radio-group/RadioGroup.vue b/packages/library/src/components/ui/radio-group/RadioGroup.vue
new file mode 100644
index 0000000..7f35f19
--- /dev/null
+++ b/packages/library/src/components/ui/radio-group/RadioGroup.vue
@@ -0,0 +1,25 @@
+<script setup lang="ts">
+import type { RadioGroupRootEmits, RadioGroupRootProps } from "reka-ui"
+import type { HTMLAttributes } from "vue"
+import { reactiveOmit } from "@vueuse/core"
+import { RadioGroupRoot, useForwardPropsEmits } from "reka-ui"
+import { cn } from "@/lib/utils"
+
+const props = defineProps<RadioGroupRootProps & { class?: HTMLAttributes["class"] }>()
+const emits = defineEmits<RadioGroupRootEmits>()
+
+const delegatedProps = reactiveOmit(props, "class")
+
+const forwarded = useForwardPropsEmits(delegatedProps, emits)
+</script>
+
+<template>
+  <RadioGroupRoot
+    v-slot="slotProps"
+    data-slot="radio-group"
+    :class="cn('grid gap-2 w-full', props.class)"
+    v-bind="forwarded"
+  >
+    <slot v-bind="slotProps" />
+  </RadioGroupRoot>
+</template>
diff --git a/packages/library/src/components/ui/radio-group/RadioGroupItem.vue b/packages/library/src/components/ui/radio-group/RadioGroupItem.vue
new file mode 100644
index 0000000..18960ab
--- /dev/null
+++ b/packages/library/src/components/ui/radio-group/RadioGroupItem.vue
@@ -0,0 +1,41 @@
+<script setup lang="ts">
+import { CircleIcon } from '@lucide/vue';
+
+import type { RadioGroupItemProps } from "reka-ui"
+import type { HTMLAttributes } from "vue"
+import { reactiveOmit } from "@vueuse/core"
+import {
+  RadioGroupIndicator,
+  RadioGroupItem,
+  useForwardProps,
+} from "reka-ui"
+import { cn } from "@/lib/utils"
+
+const props = defineProps<RadioGroupItemProps & { class?: HTMLAttributes["class"] }>()
+
+const delegatedProps = reactiveOmit(props, "class")
+
+const forwardedProps = useForwardProps(delegatedProps)
+</script>
+
+<template>
+  <RadioGroupItem
+    data-slot="radio-group-item"
+    v-bind="forwardedProps"
+    :class="
+      cn(
+        'border-input dark:bg-input/30 data-checked:bg-primary data-checked:text-primary-foreground dark:data-checked:bg-primary data-checked:border-primary aria-invalid:aria-checked:border-primary aria-invalid:border-destructive focus-visible:border-ring focus-visible:ring-ring/50 aria-invalid:ring-destructive/20 dark:aria-invalid:ring-destructive/40 dark:aria-invalid:border-destructive/50 flex size-4 rounded-full focus-visible:ring-3 aria-invalid:ring-3 group/radio-group-item peer relative aspect-square shrink-0 border outline-none after:absolute after:-inset-x-3 after:-inset-y-2 disabled:cursor-not-allowed disabled:opacity-50',
+        props.class,
+      )
+    "
+  >
+    <RadioGroupIndicator
+      data-slot="radio-group-indicator"
+      class="flex size-4 items-center justify-center"
+    >
+      <slot>
+        <CircleIcon class="bg-primary-foreground absolute top-1/2 left-1/2 size-2 -translate-x-1/2 -translate-y-1/2 rounded-full" />
+      </slot>
+    </RadioGroupIndicator>
+  </RadioGroupItem>
+</template>
diff --git a/packages/library/src/components/ui/radio-group/index.ts b/packages/library/src/components/ui/radio-group/index.ts
new file mode 100644
index 0000000..7cb0e3b
--- /dev/null
+++ b/packages/library/src/components/ui/radio-group/index.ts
@@ -0,0 +1,2 @@
+export { default as RadioGroup } from "./RadioGroup.vue"
+export { default as RadioGroupItem } from "./RadioGroupItem.vue"
diff --git a/packages/library/src/index.ts b/packages/library/src/index.ts
index 1f27b8f..0a51792 100644
--- a/packages/library/src/index.ts
+++ b/packages/library/src/index.ts
@@ -14,8 +14,8 @@ export {
   Textarea,
   Checkbox,
   CheckboxGroup,
-  RadioButton,
-  RadioButtonGroup,
+  RadioGroup,
+  RadioGroupItem,
   Switch,
   Select,
   Card,
diff --git a/packages/library/src/lib/index.ts b/packages/library/src/lib/index.ts
index 23498af..4efbb97 100644
--- a/packages/library/src/lib/index.ts
+++ b/packages/library/src/lib/index.ts
@@ -1,7 +1,5 @@
 import type { App } from 'vue'
 import {
-  RadioButton as PrimeRadioButton,
-  RadioButtonGroup as PrimeRadioButtonGroup,
   Select as PrimeSelect,
   Card as PrimeCard,
   Dialog as PrimeDialog,
@@ -19,9 +17,23 @@ import {
   badgeVariants,
   Checkbox,
   CheckboxGroup,
+  RadioGroup,
+  RadioGroupItem,
 } from '../components'
 
-export { Button, buttonVariants, Input, Textarea, Switch, Badge, badgeVariants, Checkbox, CheckboxGroup }
+export {
+  Button,
+  buttonVariants,
+  Input,
+  Textarea,
+  Switch,
+  Badge,
+  badgeVariants,
+  Checkbox,
+  CheckboxGroup,
+  RadioGroup,
+  RadioGroupItem,
+}
 
 /**
  * Build a Themeable that themes a PrimeVue component through its passthrough (`pt`) API.
@@ -65,8 +77,6 @@ const loadingIconThemeable: Themeable<typeof NychLoadingIcon> = {
 const nychthemeron: ThemeLibrary = {
   components: {
     LoadingIcon: loadingIconThemeable,
-    RadioButton: ptThemeable(PrimeRadioButton, 'radio', ['box', 'input', 'icon']),
-    RadioButtonGroup: ptThemeable(PrimeRadioButtonGroup, 'radio-group'),
     Select: ptThemeable(PrimeSelect, 'select', [
       'label',
       'dropdown',
@@ -110,10 +120,6 @@ const nychthemeron: ThemeLibrary = {
 const _engine = new ThemeEngine(nychthemeron)
 
 export const LoadingIcon = _engine.getComponent<typeof NychLoadingIcon>('LoadingIcon')
-export const RadioButton: typeof PrimeRadioButton =
-  _engine.getComponent<typeof PrimeRadioButton>('RadioButton')
-export const RadioButtonGroup: typeof PrimeRadioButtonGroup =
-  _engine.getComponent<typeof PrimeRadioButtonGroup>('RadioButtonGroup')
 export const Select: typeof PrimeSelect = _engine.getComponent<typeof PrimeSelect>('Select')
 export const Card: typeof PrimeCard = _engine.getComponent<typeof PrimeCard>('Card')
 export const Dialog: typeof PrimeDialog = _engine.getComponent<typeof PrimeDialog>('Dialog')
@@ -126,8 +132,8 @@ export const createNychthemeron = (): {
   Textarea: typeof Textarea
   Checkbox: typeof Checkbox
   CheckboxGroup: typeof CheckboxGroup
-  RadioButton: typeof PrimeRadioButton
-  RadioButtonGroup: typeof PrimeRadioButtonGroup
+  RadioGroup: typeof RadioGroup
+  RadioGroupItem: typeof RadioGroupItem
   Switch: typeof Switch
   Select: typeof PrimeSelect
   Card: typeof PrimeCard
@@ -142,8 +148,8 @@ export const createNychthemeron = (): {
   Textarea,
   Checkbox,
   CheckboxGroup,
-  RadioButton,
-  RadioButtonGroup,
+  RadioGroup,
+  RadioGroupItem,
   Switch,
   Select,
   Card,
@@ -157,8 +163,8 @@ export const createNychthemeron = (): {
     app.component('NychTextarea', Textarea)
     app.component('NychCheckbox', Checkbox)
     app.component('NychCheckboxGroup', CheckboxGroup)
-    app.component('NychRadioButton', RadioButton)
-    app.component('NychRadioButtonGroup', RadioButtonGroup)
+    app.component('NychRadioGroup', RadioGroup)
+    app.component('NychRadioGroupItem', RadioGroupItem)
     app.component('NychSwitch', Switch)
     app.component('NychSelect', Select)
     app.component('NychCard', Card)
diff --git a/packages/library/tests/RadioGroup.spec.ts b/packages/library/tests/RadioGroup.spec.ts
new file mode 100644
index 0000000..7a06724
--- /dev/null
+++ b/packages/library/tests/RadioGroup.spec.ts
@@ -0,0 +1,32 @@
+import { describe, it, expect } from 'vitest'
+import { h } from 'vue'
+import { mount } from '@vue/test-utils'
+import { RadioGroup, RadioGroupItem } from '../src/lib'
+
+describe('RadioGroup', () => {
+  it('marks the item matching modelValue as checked', () => {
+    const wrapper = mount(RadioGroup, {
+      props: { modelValue: 'hades' },
+      slots: {
+        default: () => [
+          h(RadioGroupItem, { value: 'apollo' }),
+          h(RadioGroupItem, { value: 'hades' }),
+        ],
+      },
+    })
+    const items = wrapper.findAllComponents(RadioGroupItem)
+    expect(items[0]?.get('button').attributes('data-state')).toBe('unchecked')
+    expect(items[1]?.get('button').attributes('data-state')).toBe('checked')
+  })
+
+  it('emits update:modelValue when an item is selected', async () => {
+    const wrapper = mount(RadioGroup, {
+      props: { modelValue: 'apollo' },
+      slots: {
+        default: () => [h(RadioGroupItem, { value: 'hades' })],
+      },
+    })
+    await wrapper.findComponent(RadioGroupItem).get('button').trigger('click')
+    expect(wrapper.emitted('update:modelValue')?.[0]).toEqual(['hades'])
+  })
+})
diff --git a/packages/library/tests/lib.spec.ts b/packages/library/tests/lib.spec.ts
index 62e3929..4a523c5 100644
--- a/packages/library/tests/lib.spec.ts
+++ b/packages/library/tests/lib.spec.ts
@@ -3,8 +3,6 @@ import type { App } from 'vue'
 import {
   createNychthemeron,
   LoadingIcon,
-  RadioButton,
-  RadioButtonGroup,
   Select,
   Card,
   Dialog,
@@ -65,8 +63,6 @@ describe('LoadingIcon', () => {
 
 describe('themed pt components', () => {
   const cases = [
-    { name: 'RadioButton', component: RadioButton, base: 'nych-radio' },
-    { name: 'RadioButtonGroup', component: RadioButtonGroup, base: 'nych-radio-group' },
     { name: 'Select', component: Select, base: 'nych-select' },
     { name: 'Card', component: Card, base: 'nych-card' },
     { name: 'Dialog', component: Dialog, base: 'nych-dialog' },
diff --git a/packages/playground/stories/RadioButton.stories.ts b/packages/playground/stories/RadioButton.stories.ts
deleted file mode 100644
index 3e73ad4..0000000
--- a/packages/playground/stories/RadioButton.stories.ts
+++ /dev/null
@@ -1,109 +0,0 @@
-import type { Meta, StoryObj } from '@storybook/vue3-vite'
-import { ref } from 'vue'
-
-import {
-  RadioButton as NychRadioButton,
-  RadioButtonGroup as NychRadioButtonGroup,
-} from '@nychthemeron/library'
-
-const meta = {
-  title: 'Components/RadioButton',
-  component: NychRadioButton,
-  parameters: {
-    layout: 'centered',
-  },
-  tags: ['autodocs'],
-  argTypes: {
-    disabled: {
-      control: { type: 'boolean' },
-      description: 'Disable the radio button',
-    },
-  },
-} satisfies Meta<typeof NychRadioButton>
-
-export default meta
-type Story = StoryObj<typeof meta>
-
-export const Default: Story = {
-  render: () => ({
-    components: { NychRadioButton },
-    setup() {
-      const realm = ref('underworld')
-      return { realm }
-    },
-    template: `
-      <div style="display: flex; gap: 1rem;">
-        <NychRadioButton v-model="realm" value="underworld" />
-        <NychRadioButton v-model="realm" value="sky" />
-      </div>
-    `,
-  }),
-}
-
-export const Disabled: Story = {
-  render: () => ({
-    components: { NychRadioButton },
-    setup() {
-      const realm = ref('sky')
-      return { realm }
-    },
-    template: `
-      <div style="display: flex; gap: 1rem;">
-        <NychRadioButton :modelValue="'underworld'" value="sky" disabled />
-        <NychRadioButton :modelValue="'sky'" value="sky" disabled />
-      </div>
-    `,
-  }),
-}
-
-export const WithLabels: Story = {
-  render: () => ({
-    components: { NychRadioButton },
-    setup() {
-      const god = ref('apollo')
-      return { god }
-    },
-    template: `
-      <div style="display: flex; flex-direction: column; gap: 0.75rem; font-family: var(--font-sans); color: var(--text-body);">
-        <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-          <NychRadioButton v-model="god" value="apollo" /> Apollo
-        </label>
-        <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-          <NychRadioButton v-model="god" value="hades" /> Hades
-        </label>
-        <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-          <NychRadioButton v-model="god" value="hermes" /> Hermes
-        </label>
-        <p style="color: var(--text-muted); margin-top: 0.25rem;">Chosen: {{ god }}</p>
-      </div>
-    `,
-  }),
-}
-
-// RadioButtonGroup binds the v-model once on the group and shares a name across
-// children — the children only carry a `value`.
-export const Group: Story = {
-  render: () => ({
-    components: { NychRadioButton, NychRadioButtonGroup },
-    setup() {
-      const god = ref('apollo')
-      return { god }
-    },
-    template: `
-      <div style="font-family: var(--font-sans); color: var(--text-body);">
-        <NychRadioButtonGroup v-model="god" name="god">
-          <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-            <NychRadioButton value="apollo" /> Apollo
-          </label>
-          <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-            <NychRadioButton value="hades" /> Hades
-          </label>
-          <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
-            <NychRadioButton value="hermes" /> Hermes
-          </label>
-        </NychRadioButtonGroup>
-        <p style="color: var(--text-muted); margin-top: 0.75rem;">Chosen: {{ god }}</p>
-      </div>
-    `,
-  }),
-}
diff --git a/packages/playground/stories/RadioGroup.stories.ts b/packages/playground/stories/RadioGroup.stories.ts
new file mode 100644
index 0000000..c425d82
--- /dev/null
+++ b/packages/playground/stories/RadioGroup.stories.ts
@@ -0,0 +1,70 @@
+import type { Meta, StoryObj } from '@storybook/vue3-vite'
+import { ref } from 'vue'
+
+import { RadioGroup as NychRadioGroup, RadioGroupItem as NychRadioGroupItem } from '@nychthemeron/library'
+
+const meta = {
+  title: 'Components/RadioGroup',
+  component: NychRadioGroup,
+  parameters: {
+    layout: 'centered',
+  },
+  tags: ['autodocs'],
+} satisfies Meta<typeof NychRadioGroup>
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const Default: Story = {
+  render: () => ({
+    components: { NychRadioGroup, NychRadioGroupItem },
+    setup() {
+      const realm = ref('underworld')
+      return { realm }
+    },
+    template: `
+      <NychRadioGroup v-model="realm" style="display: flex; flex-direction: row; gap: 1rem;">
+        <NychRadioGroupItem value="underworld" />
+        <NychRadioGroupItem value="sky" />
+      </NychRadioGroup>
+    `,
+  }),
+}
+
+export const Disabled: Story = {
+  render: () => ({
+    components: { NychRadioGroup, NychRadioGroupItem },
+    template: `
+      <NychRadioGroup model-value="sky" disabled style="display: flex; flex-direction: row; gap: 1rem;">
+        <NychRadioGroupItem value="underworld" />
+        <NychRadioGroupItem value="sky" />
+      </NychRadioGroup>
+    `,
+  }),
+}
+
+export const WithLabels: Story = {
+  render: () => ({
+    components: { NychRadioGroup, NychRadioGroupItem },
+    setup() {
+      const god = ref('apollo')
+      return { god }
+    },
+    template: `
+      <div style="font-family: var(--font-sans); color: var(--text-body);">
+        <NychRadioGroup v-model="god">
+          <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
+            <NychRadioGroupItem value="apollo" /> Apollo
+          </label>
+          <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
+            <NychRadioGroupItem value="hades" /> Hades
+          </label>
+          <label style="display: flex; align-items: center; gap: 0.5rem; cursor: pointer;">
+            <NychRadioGroupItem value="hermes" /> Hermes
+          </label>
+        </NychRadioGroup>
+        <p style="color: var(--text-muted); margin-top: 0.75rem;">Chosen: {{ god }}</p>
+      </div>
+    `,
+  }),
+}