Carrie Underwood, Luke Bryan and Lionel Richie will return as judges in 'American Idol' Season 24.

American Idol: Luke Bryan, Lionel Richie & Carrie Underwood all back for Season 9; Ryan Seacrest expected to join them. Plus, audition information.

American Idol returns for season 9 with Ryan Seacrest returning as host, and Carrie Underwood, Luke Bryan, and Lionel Ritchie set to return as judges.