diff --git a/types/is-regex/index.d.ts b/types/is-regex/index.d.ts
new file mode 100644
index 0000000000..96ec522bb1
--- /dev/null
+++ b/types/is-regex/index.d.ts
@@ -0,0 +1,11 @@
+// Type definitions for is-regex 1.0
+// Project: https://github.com/ljharb/is-regex
+// Definitions by: Jordan Harband <https://github.com/ljharb>
+//                 ExE Boss <https://github.com/ExE-Boss>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/**
+ * Returns whether the value is a valid `RegExp` object with the `[[RegExpMatcher]]` internal slot.
+ */
+declare function isRegex(value: any): value is RegExp;
+export = isRegex;
diff --git a/types/is-regex/is-regex-tests.ts b/types/is-regex/is-regex-tests.ts
new file mode 100644
index 0000000000..72fbd6ddae
--- /dev/null
+++ b/types/is-regex/is-regex-tests.ts
@@ -0,0 +1,7 @@
+import isRegExp = require('is-regex');
+
+declare var any: unknown;
+
+if (isRegExp(any)) {
+    any; // $ExpectType RegExp
+}
diff --git a/types/is-regex/tsconfig.json b/types/is-regex/tsconfig.json
new file mode 100644
index 0000000000..244c89726d
--- /dev/null
+++ b/types/is-regex/tsconfig.json
@@ -0,0 +1,19 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": ["ES2015"],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": ["../"],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "is-regex-tests.ts",
+        "index.d.ts"
+    ]
+}
diff --git a/types/is-regex/tslint.json b/types/is-regex/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/is-regex/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }