William "Will" Emerson Arnett (born May 4, 1970) is a Canadian actor, known for his many comedic roles as George Oscar "G.O.B." Bluth II in the Fox series Arrested Development, Devon Banks in the NBC series 30 Rock, Brent Wilts in the IFC series The Increasingly Poor Decisions of Todd Margaret, Chris Brinkley on Up All Night and Nathan Miller in the CBS series The Millers. He has appeared in films such as Semi-Pro, Blades of Glory, RV, Hot Rod, Let's Go to Prison, and The Brothers Solomon. Arnett is also a voice actor for commercials, animated films, television cartoons, and video games, such as voicing Batman in The Lego Movie.
For Nickelodeon, Arnett guest stared as the Ghostwriter on the Danny Phantom Christmas special: The Fright Before Christmas and played the role of Vernon Fenwick in the Teenage Mutant Ninja Turtles movie.