diff --git a/docs/rules/no-sx-prop.md b/docs/rules/no-sx-prop.md
new file mode 100644
index 0000000..e3128cf
--- /dev/null
+++ b/docs/rules/no-sx-prop.md
@@ -0,0 +1,33 @@
+# No Wildcard Imports
+
+## Rule Details
+
+This rule enforces that no sx props are used with `@primer/react`.
+
+👎 Examples of **incorrect** code for this rule
+
+```jsx
+import {Button} from '@primer/react'
+
+function ExampleComponent() {
+  return (
+    <Button
+      sx={
+        {
+          /* ... */
+        }
+      }
+    />
+  )
+}
+```
+
+👍 Examples of **correct** code for this rule:
+
+```jsx
+import {Button} from '@primer/react'
+
+function ExampleComponent() {
+  return <Button className="..." />
+}
+```
diff --git a/src/index.js b/src/index.js
index bc284b0..fe010f2 100644
--- a/src/index.js
+++ b/src/index.js
@@ -12,6 +12,7 @@ module.exports = {
     'a11y-use-next-tooltip': require('./rules/a11y-use-next-tooltip'),
     'use-deprecated-from-deprecated': require('./rules/use-deprecated-from-deprecated'),
     'no-wildcard-imports': require('./rules/no-wildcard-imports'),
+    'no-sx-prop': require('./rules/no-sx-prop'),
     'no-unnecessary-components': require('./rules/no-unnecessary-components'),
     'prefer-action-list-item-onselect': require('./rules/prefer-action-list-item-onselect'),
   },
diff --git a/src/rules/__tests__/no-sx-prop.test.js b/src/rules/__tests__/no-sx-prop.test.js
new file mode 100644
index 0000000..33b772b
--- /dev/null
+++ b/src/rules/__tests__/no-sx-prop.test.js
@@ -0,0 +1,34 @@
+'use strict'
+
+const {RuleTester} = require('eslint')
+const rule = require('../no-sx-prop')
+
+const ruleTester = new RuleTester({
+  parser: require.resolve('@typescript-eslint/parser'),
+  parserOptions: {
+    ecmaVersion: 'latest',
+    sourceType: 'module',
+    ecmaFeatures: {
+      jsx: true,
+    },
+  },
+})
+
+ruleTester.run('no-sx-prop', rule, {
+  valid: [],
+  invalid: [
+    {
+      code: `
+        import {SegmentedControl} from '@primer/react';
+        function Example() {
+          return <SegmentedControl sx={{color: 'red'}} />
+        }
+      `,
+      errors: [
+        {
+          messageId: 'sxProp',
+        },
+      ],
+    },
+  ],
+})
diff --git a/src/rules/no-sx-prop.js b/src/rules/no-sx-prop.js
new file mode 100644
index 0000000..28a8d2f
--- /dev/null
+++ b/src/rules/no-sx-prop.js
@@ -0,0 +1,89 @@
+'use strict'
+
+const url = require('../url')
+
+const forbidden = new Set([
+  // 'ActionList',
+  // 'ActionList.Divider',
+  // 'ActionList.Group',
+  // 'ActionList.Item',
+  // 'ActionList.LeadingVisual',
+  // 'ActionList.LinkItem',
+
+  // 'ActionMenu.Button',
+  // 'ActionMenu.Overlay',
+
+  // 'Avatar',
+  // 'AvatarStack',
+
+  // 'BorderBox',
+  // 'Box',
+
+  // 'BranchName',
+
+  // 'Breadcrumbs',
+  // 'Breadcrumbs.Item',
+
+  'SegmentedControl',
+  'SegmentedControl.Button',
+
+  'SplitPageLayout.Pane',
+
+  // 'UnderlineNav',
+  // 'UnderlineNav.Item',
+])
+
+/**
+ * @type {import('eslint').Rule.RuleModule}
+ */
+module.exports = {
+  meta: {
+    type: 'problem',
+    docs: {
+      description: 'The sx prop is discouraged. Use CSS Modules instead',
+      recommended: true,
+      url: url(module),
+    },
+    fixable: true,
+    schema: [],
+    messages: {
+      sxProp:
+        'The `sx` prop has been deprecated by @primer/react and will be removed in the next major release. Please migrate to CSS Modules instead.',
+    },
+  },
+  create(context) {
+    return {
+      JSXOpeningElement(node) {
+        let name = null
+
+        if (
+          node.name.type === 'JSXMemberExpression' &&
+          node.name.object.type === 'JSXIdentifier' &&
+          node.name.property.type === 'JSXIdentifier'
+        ) {
+          name = `${node.name.object.name}.${node.name.property.name}`
+        } else if (node.name.type === 'JSXIdentifier') {
+          name = node.name.name
+        }
+
+        if (!forbidden.has(name)) {
+          return
+        }
+
+        const hasSxProp = node.attributes.some(attr => {
+          if (attr.name?.type === 'JSXIdentifier' && attr.name.name === 'sx') {
+            return true
+          }
+          return false
+        })
+
+        if (hasSxProp) {
+          context.report({
+            node,
+            messageId: 'sxProp',
+          })
+        }
+      },
+    }
+  },
+}