In what may be a sign that we're all getting old, Matt Damon, who became a bona fide star 13 years ago with the release of 'Good Will Hunting,' turns 40 today.

To celebrate one of the most successful (and, in many ways, underrated) careers in Hollywood, we're taking a look back at some of Matt Damon's best movies, from little-seen gems like 'The Informant!' to the uber-popular 'Bourne' trilogy.

Check them out after the jump, then share your favorite Matt Damon movies in the comments.
Good Will Hunting Movie Poster
Good Will Hunting
Based on 28 critics

Will Hunting (Matt Damon) has a genius-level IQ but chooses to work as a janitor at MIT. When he solves... Read More

The Talented Mr. Ripley Movie Poster
The Talented Mr. Ripley
Based on 35 critics

To be young and carefree amid the blue waters and idyllic landscape of sun-drenched Italy in the late... Read More

Ocean's Eleven Movie Poster
Ocean's Eleven
Based on 35 critics

Dapper Danny Ocean (George Clooney) is a man of action. Less than 24 hours into his parole from a New... Read More

The Bourne Supremacy Movie Poster
The Bourne Supremacy
Based on 39 critics

Jason Bourne (Matt Damon) is living in India when he is framed by Russian agent Kirill (Karl Urban) for... Read More

The Bourne Ultimatum Movie Poster
The Bourne Ultimatum
Based on 38 critics

Jason Bourne (Matt Damon) continues his international quest to uncover his true identity. From Russia... Read More

The Departed Movie Poster
The Departed
Based on 39 critics

South Boston cop Billy Costigan (Leonardo DiCaprio) goes under cover to infiltrate the organization of... Read More

The Informant! Movie Poster
The Informant!
Based on 37 critics

Though a rising star in the ranks of Archer Daniels Midland, Mark Whitacre (Matt Damon) suddenly exposes... Read More

categories Features, Hot Topic