Credit: Michael Loccisano/Getty Images.

Zach Galifianakis is engaged to Quinn Lundberg, according to Celebuzz.com. "The Hangover" actor, 42, and his fiancée have already sent out wedding invitations for their August 11 wedding.

A source tells the site, "The wedding invite is very Zach." The source added, "While it has the formal and standard details of who, what, when, where - including Zach's full name, Zachary Knight Galifianakis, and his fiancee's, Mary Quinn Lundberg - it is also very funny."

Lundberg, who is 29, is the co-founder of the charity Growing Voices.