diff --git a/native/utils/typeahead-utils.js b/native/utils/typeahead-utils.js
new file mode 100644
--- /dev/null
+++ b/native/utils/typeahead-utils.js
@@ -0,0 +1,9 @@
+// @flow
+
+import { oldValidUsernameRegexString } from 'lib/shared/account-utils';
+
+const nativeTypeaheadRegex: RegExp = new RegExp(
+  `((^(.|\n)*\\s+)|^)@(${oldValidUsernameRegexString})?$`,
+);
+
+export { nativeTypeaheadRegex };