Zach Galifianakis (gebore 1 Oktober 1969) is 'n Amerikaanse akteur, vervaardiger, en skrywer. Hy is bekend vir sy rolle in die rolprente The Hangover (2009), Due Date (2010), The Hangover Part II (2011), en Birdman or (The Unexpected Virtue of Ignorance) (2014). 2004: Zach & Avery of Fergus 2005: The Comedians of Comedy 2008: Visioneers 2009: The Hangover 2009: G-Force 2010: Due Date 2010: Dinner for Schmucks 2010: It's Kind of a Funny Story 2011: The Hangover Part II 2011: Puss in Boots 2012: The Campaign 2012: The Bitter Buddha 2012: Mansome 2013: Are You Here 2013: The Hangover Part III 2014: Birdman or (The Unexpected Virtue of Ignorance) 2015: Queen Mimi 2015: Tig 2016: Keeping Up with the Joneses 2016: Masterminds 2019: Missing Link 2019: The Sunlit Night 1997: Apt.