William Emerson Arnett (; born May 4, 1970) is a Canadian-American actor, voice actor, comedian and producer. He is best known for his roles as Gob Bluth in the Fox/Netflix series Arrested Development (2003–2006, 2013, 2018–2019) and as the titular character in the Netflix series BoJack Horseman (2014–2020). He has appeared in films such as Let’s Go To Prison (2006), Blades Of Glory (2007), Semi-Pro (2008), G-Force (2009), Jonah Hex (2010), and Show Dogs (2018).