Chris Rock

Chris Rock

Funnyman Chris Rock is selling a walk-on role in his next movie to raise money for a breast cancer charity.

The comedian is giving one fan the chance to play a bit part in his upcoming film Finally Famous, which also stars Rosario Dawson and Gabrielle Union.

The winning bidder will be invited to bring a friend for a meet-and-greet with Rock, and they will be treated to an exclusive tour of the set.

Rock's auction on CharityBuzz.com ends on 4 June (13) and the prize is expected to raise $15,000 for the Triple Negative Breast Cancer Foundation.