Let's make this birthday one to remember.

40 years old (Born on May 24, 1984)

Happy Birthday, Sarah Hagan! From your unforgettable portrayal of Millie Kentner in "Freaks and Geeks," you've given us countless laughs—and taught us that mathletes can indeed be cool. Your earnest charm made every awkward teenage moment feel hilariously relatable.

Whether you're navigating high school hallways or lighting up the screen with quirky wit, you always bring authenticity to each role. Here's hoping this birthday is filled with as much joy (and fewer embarrassing moments) than a typical day at McKinley High!

Keep shining bright—your fans can't wait for more memorable performances ahead. Cheers to another fantastic year!