Cannon is the morning host on New York City's CBS Radio-owned WXRK-FM (92.3), also the host of a syndicated music countdown show, been in feature films, and is the father of twins with his wife Mariah Carey. Now, you can add TV star to Nick Cannon's resume. Cannon will be joining the cast of the TV sitcom "Up All Night,' starring Christina Applegate, Maya Rudolph and Will Arnett. He will play a radio sidekick to Rudolph's talk show host character. Cannon will remain the host of "America's Got Talent," along with his other ventures.