Zachary Knight “Zach” Galifianakis (/ˌɡælɨfəˈnækɨs/ GAL-i-fə-NAK-iss; born October 1, 1969) is an American stand-up comedian and actor, known for his film and television appearances including his own Comedy Central Presents special. He also portrayed Alan Garner in The Hangover Trilogy,…