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Zach Galifianakis is no longer a one-man wolf pack.

The Hangover star got quietly engaged to longtime girlfriend Quinn Lundberg, a former ballerina and the co-founder of the charity Growing Voices, Celebuzz is reporting.

Related: The Wolfpack is Back for a Third 'Hangover' Round

The couple has already sent out wedding invitations for the August 11 nuptials, which reportedly reflect the funnyman's quirky sense of humor.

"The wedding invite is very Zach," an insider revealed. "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."

Video: Will Ferrell and Zach Galifianakis Launch 'The Campaign'

Up next for Galifianakis is The Campaign opposite Will Ferrell, where the two play North Carolina politicians with presidential aspirations, out August 10.