Beyonc� Knowles has not only signed on to star in 'Cadillac Records' but Sony BMG Films have announced that she will act as executive producer on the project too.
Knowles will play blues singer Etta James and will also record four songs for the soundtrack.
The 1950's period film is about the seminal Chicago record label Chess Records and its founder, Leonard Chess, who started out selling albums out of his Cadillac.
Etta James, Elvis Presley, Muddy Waters, Howlin' Wolf and Chuck Berry are among the legends who recorded on Chess.
Adrien Brody has already been cast as Chess and Jeffrey Wright (Waters), Cedric the Entertainer (Willie Dixon) and Columbus Short (Little Walter) are also on board.
Knowles will donate a portion of her fees to recovering addicts through her family's charity the Survivor Foundation.
Her song 'Irreplaceable' earned a record of the year Grammy nod this year.
