Arnett recently began filming Walt Disney Pictures' romantic comedy When in Rome opposite Kristen Bell and Anjelica Huston. He will play a suitor who is aggressively trying to win the heart of a young girl (Bell) after she steals coins from a Roman fountain.
Arnett earned his first Emmy nomination in 2006 for his work on the critically acclaimed Fox sitcom "Arrested Development", where he portrayed "Gob Bluth", for three seasons. From time to time, Arnett guest stars on NBC's "30 Rock" playing Devon Banks.
Before "Arrested Development", Arnett was a regular on the NBC comedy series "The Mike O'Malley Show". His additional television credits include guest-starring roles on "Sex and the City", "The Sopranos", "Boston Public", "Third Watch" and "Law & Order: Special Victims Unit". Arnett also appeared on NBC's "Will & Grace" playing Jack's dance nemesis while auditioning to become a backup dancer for Janet Jackson.
Arnett's other feature credits include Ice Age 2: The Meltdown, R.V. opposite Robin Williams, Monster-In-Law, The Waiting Game, The Broken Giant, Southie and Ed's Next Move. Additionally, he can be heard in a variety of commercials most notably as the voice of GMC Trucks.
Arnett currently resides in New York where he lives with his wife, actress Amy Poehler.