Alec Baldwin has joined the cast of the big-screen adaptation of the Broadway musical, "Rock of Ages," the film's director said.

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Tom Cruise, Mary J. Blige and Julianne Hough have already been announced as cast in the movie musical.

"So, based on info I got today, I'm gonna confirm Alec Baldwin as Dennis in Rock Of Ages. Hollah," EW.com said director Adam Shankman tweeted during the weekend.

The entertainment Web site described the character of Dennis as an "aging rocker who stays in the game by running a Hollywood club."

An 11-time Emmy nominee, Baldwin has won two Emmy Awards for the NBC comedy "30 Rock." He has won five Screen Actors Guild Awards for his work on the show, and was nominated for a supporting actor Oscar for "The Cooler" in 2003.