Singer Alicia Keys is warning filmgoers that her brutal role as an assassin in feature film Smokin' Aces may not be appropriate for her younger fans.

The R+B star is trying her luck on the big screen playing "bad-a*s" assassin Georgia Sykes in the film, alongside Ben Affleck, Don Cheadle and Andy Garcia.

She explains, "I think I have to put out a public service announcement for all my fans who are under 18. This role is that crazy."

"I get to deal with emotions that most people have to suppress, like extreme anger and rage."

The Fallin' singer isn't daunted by her first dramatic role, insisting, "I grew up around the theatre, my mother was an actress. It's always been my destiny."