diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0991de2e4..e7929a669 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Add support for `inline` option when defining `@theme` values ([#14095](https://github.com/tailwindlabs/tailwindcss/pull/14095))
+- Add `inert` variant ([#14129](https://github.com/tailwindlabs/tailwindcss/pull/14129))
 
 ## [4.0.0-alpha.18] - 2024-07-25
 
diff --git a/packages/tailwindcss/src/__snapshots__/intellisense.test.ts.snap b/packages/tailwindcss/src/__snapshots__/intellisense.test.ts.snap
index bd11e80ee..026f62ecd 100644
--- a/packages/tailwindcss/src/__snapshots__/intellisense.test.ts.snap
+++ b/packages/tailwindcss/src/__snapshots__/intellisense.test.ts.snap
@@ -1942,6 +1942,7 @@ exports[`getVariants 1`] = `
       "active",
       "enabled",
       "disabled",
+      "inert",
       "has",
       "aria",
       "data",
@@ -1993,6 +1994,7 @@ exports[`getVariants 1`] = `
       "active",
       "enabled",
       "disabled",
+      "inert",
       "has",
       "aria",
       "data",
@@ -2284,6 +2286,13 @@ exports[`getVariants 1`] = `
     "selectors": [Function],
     "values": [],
   },
+  {
+    "hasDash": true,
+    "isArbitrary": false,
+    "name": "inert",
+    "selectors": [Function],
+    "values": [],
+  },
   {
     "hasDash": true,
     "isArbitrary": true,
@@ -2324,6 +2333,7 @@ exports[`getVariants 1`] = `
       "active",
       "enabled",
       "disabled",
+      "inert",
       "has",
       "aria",
       "data",
diff --git a/packages/tailwindcss/src/variants.test.ts b/packages/tailwindcss/src/variants.test.ts
index 895d444e4..c4195b3e4 100644
--- a/packages/tailwindcss/src/variants.test.ts
+++ b/packages/tailwindcss/src/variants.test.ts
@@ -695,6 +695,23 @@ test('disabled', () => {
   expect(run(['disabled/foo:flex'])).toEqual('')
 })
 
+test('inert', () => {
+  expect(run(['inert:flex', 'group-inert:flex', 'peer-inert:flex'])).toMatchInlineSnapshot(`
+    ".group-inert\\:flex:is(:where(.group):is([inert], [inert] *) *) {
+      display: flex;
+    }
+
+    .peer-inert\\:flex:is(:where(.peer):is([inert], [inert] *) ~ *) {
+      display: flex;
+    }
+
+    .inert\\:flex:is([inert], [inert] *) {
+      display: flex;
+    }"
+  `)
+  expect(run(['inert/foo:flex'])).toEqual('')
+})
+
 test('group-[...]', () => {
   expect(
     run([
diff --git a/packages/tailwindcss/src/variants.ts b/packages/tailwindcss/src/variants.ts
index 4a05b9adc..cef987c95 100644
--- a/packages/tailwindcss/src/variants.ts
+++ b/packages/tailwindcss/src/variants.ts
@@ -465,6 +465,8 @@ export function createVariants(theme: Theme): Variants {
     staticVariant(key, [value])
   }
 
+  staticVariant('inert', ['&:is([inert], [inert] *)'])
+
   variants.compound('has', (ruleNode, variant) => {
     if (variant.modifier) return null