Will Arnett starred in the basketball-themed comedy Semi Pro with Will Ferrell and Woody Harrelson. He was also seen opposite Will Ferrell, Jon Heder and his wife Amy Poehler in the figure skating comedy Blades of Glory, as well as starring in Brothers Solomon opposite Will Forte. In addition, Arnett lent his voice to blockbuster animated feature Ice Age 2: The Meltdown and costarred opposite Robin Williams in R.V., directed by Barry Sonnenfeld.

Arnett earned his first Emmy® nomination for his work on the critically acclaimed Fox sitcom Arrested Development, where he portrayed Gob Bluth. The show was nominated for two Emmys® for Outstanding Comedy Series, winning one for its first season. It also nabbed a Golden Globe® nomination - and a cult following of loyal fans.

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 was seen twice on NBC's 30 Rock playing Devon Banks in a very memorable guest-starring role.

Arnett's feature credits include roles in Monster-In-Law, The Waiting Game, The Broken Giant, Southie and Ed's Next Move. Additionally, he served as the narrator for the film Series 7: The Contenders and has been heard in a variety of commercials most notably as the voice of GMC Trucks.