Charitybuzz is auctioning off a walk-on role in Chris Rock’s upcoming dramedy, Finally Famous. 

The winning bidder will also receive a tour of the set and have the opportunity to bring a friend for a meet and greet with Chris Rock.

All proceeds from the auction will benefit the Triple Negative Breast Cancer Foundation.

Rosario Dawson and Gabrielle Union co-star with Chris Rock in the movie, which he wrote and will direct.

Here’s the project’s official synopsis:

ANDRE ALLEN is a comedian turned film star who, despite the expectations of his millions of fans, is determined to reinvent himself as a “serious” actor. Although his latest pretentiously historical film project is tanking, his upcoming television wedding to pretty, popular reality star, ERICA LONG, is the biggest media event of the year. In the midst of all the frenzy leading up to his televised nuptials, Andre agrees to be interviewed for the New Yorker by CHELSEA BROWN, a gorgeous but no-frills young woman with a sharp intelligence that matches his own. It’s a feisty, funny, no-holds-barred interaction that may well change the course of both their lives…

Rosario Dawson plays the Chelsea Brown character, while Gabrielle Union plays Erica Long.

Scott Rudin is producing (he also produced Chris Rock’s Broadway debut, The Mother-F with the Hat).