William Emerson "Will" Arnett (born May 4, 1970) is a Canadian actor and comedian . He is most well known for his many comedic roles, including George Oscar Bluth II ("G.O.B.") in the Fox series Arrested Development and Devon Banks in the NBC series 30 Rock, for which he earned a combined five Emmy Award nominations. He also appeared in the IFC series The Increasingly Poor Decisions of Todd Margaret, Up All Night and in the CBS series The Millers; and in films such as Monster-in-Law, Semi-Pro, Blades of Glory, RV, Hot Rod, Let's Go to Prison, The Brothers Solomon and Teenage Mutant Ninja Turtles. Arnett is also a voice actor for commercials, video games, television cartoons and animated films, and has lent his voice to The Simpsons, Ratatouille and The Lego Movie.