The 42-year-old actor tied the knot with long-term girlfriend Quinn Lundberg in a "super private" ceremony in Vancouver, Canada, on Saturday (11.08.12).
A source told Us Weekly: "The wedding ceremony was held at UBC Farm at 4 pm. It was super private and intimate and only lasted about 30 minutes -everyone was out by 5 pm."
The `Hangover` star and his 29-year-old bride - who is the co-founder of charity Growing Voices - then held a reception at a nearby restaurant.
The couple sent out invitations to their nuptials in June.
A source said at the time: "While it has the formal and standard details of who, what, when, where - including Zach`s full name Zachary Knight Galifianakis and his fiancée`s, Mary Quinn Lundberg - it is also very funny.
"Zach included a drawing of himself and his bride-to-be. He made sure he looked like a little troll, while Quinn is a stunning tall blonde princess."
The `Due Date` star has previously spoken about his desire to settle down and have a large family.
He said: "I`ve been wanting kids for 10 years. I`d love to adopt, have them naturally - all of it. I want, like, 15."