Biggs and Mollen met on the 2007 set of "My Best Friend's Girl." They were engaged in January.
Nicole Chabot, Biggs's representative, told People magazine the couple wed in a "very private ceremony."
Chabot offered no other details, the magazine said.
Biggs is best known for his work in the "American Pie" film series, while Mollen had a recurring role on TV's "Angel."