William Thomas Hader Jr. (born June 7, 1978) is an American comedian, actor, producer and writer. He is known for his work on Saturday Night Live (2005–2013), for which he has received four Emmy nominations, South Park (2009–present), and his parody series Documentary Now! (2015–present). He created and stars in the HBO series Barry, which began airing in March 2018 and earned Hader an Emmy for Outstanding Lead Actor in a Comedy Series and three other Emmy nominations for Outstanding Comedy Series, Outstanding Directing for a Comedy Series, and Outstanding Writing for a Comedy Series in its first season.
He is also known for his supporting work in comedy films, such as You, Me and Dupree (2006), Hot Rod (2007), Superbad (2007), Forgetting Sarah Marshall (2008), Tropic Thunder (2008), Night at the Museum: Battle of the Smithsonian (2009), Paul (2011), Men in Black 3 (2012), and Maggie's Plan (2015). He has also had lead voice roles in Cloudy with a Chance of Meatballs (2009), Inside Out (2015), and The Angry Birds Movie (2016) as well as lead roles in the dramedy The Skeleton Twins (2014) and the romantic comedy Trainwreck (2015). He has also voiced supporting characters in Pixar films, including Monsters University and Finding Dory.