'Rock of Ages' just scored another big name. Alec Baldwin is joining the highly anticipated musical, according to director Adam Shankman, who confirmed the news over Twitter.

"So, based on info I got today, I'm gonna confirm Alec Baldwin as Dennis in Rock Of Ages. Hollah," Shankman wrote.

The '30 Rock' star will play the part of Dennis Dupree, an ex-rocker who runs the Rock of Ages nightclub in order to hold onto his rock star past.

Baldwin is the latest bold name to join the all-star cast, which includes Tom Cruise, Mary J. Blige and Julianne Hough.

"Can't wait to start #rockofagesmovie. Julianne Hough, alec Baldwin, Mary j Blige, Tom cruis confirmed. I love my cast. More to come," the director tweeted.