Famous for his title role in the 2008 comedy movie Finn on the Fly and for his writing and acting work on the short-lived Canadian comedy series Almost Heroes, he is also known for his recurring role on the Fox series Life on a Stick.
Early in his comedy career, he appeared in episodes of The Sean Cullen Show and The Late Late Show with Craig Kilborn.
He appears as the character Dime in the 2004 movie National Lampoon's Going the Distance.
Born in Calgary, Alberta, Canada, he is the brother of screenwriter and producer Jason Belleville.
He and Brenda Song were both in the cast of the Disney Channel Original movie Stuck in the Suburbs (2004).