William Thomas Hader Jr. (born June 7, 1978) is an American comedian, actor, voice actor, writer, producer and director. He was a cast member on Saturday Night Live (2005–2013), for which he has received four Emmy Award nominations and a Peabody Award, a writer on South Park (2008–present) and co-creator of the IFC series Documentary Now! (2015–present). In 2018, he created and began starring as the titular assassin in the HBO dark comedy series Barry, which earned Hader an Emmy Award for Outstanding Lead Actor in a Comedy Series and consecutive nominations for Outstanding Comedy Series, Outstanding Directing for a Comedy Series and Outstanding Writing for a Comedy Series for its first two seasons.
He had supporting roles in Superbad (2007), Tropic Thunder (2008), Forgetting Sarah Marshall (2008), Adventureland (2009), Paul (2011), Men in Black 3 (2012), The To Do List (2013), Maggie's Plan (2015) and It Chapter Two (2019) and leading roles in The Skeleton Twins (2014) and Trainwreck (2015). He has voiced lead characters in the Cloudy with a Chance of Meatballs franchise (2009-2014), Inside Out (2015), the Angry Birds films (2016, 2019) and Ralph Breaks the Internet (2018), and supporting characters in Monsters University (2013), Turbo (2013) and Finding Dory (2016).