The couple, who hosted their rehearsal dinner on Thursday (August 9), tied the knot this weekend in Vancouver, Canada, reports US Weekly.
"The wedding ceremony was held at UBC Farm at 4pm," a source told the publication of the small ceremony.
"It was super private and intimate and only lasted about 30 minutes - everyone was out by 5pm."
Galifianakis and Lundberg are said to have held the reception at a local restaurant with their closest family and friends.
The Campaign actor's engagement to Lundberg was revealed in June when one of the wedding invitations the pair sent out was leaked online.
Watch a trailer for Zach Galifianakis's new movie The Campaign below: