Steve Granitz/WireImage 1 / 10
Steve Granitz/WireImage 1 / 10

Leonardo DiCaprio is giving Sean Penn's Haiti charity a boost by auctioning off the chance to party with him at a Hollywood bash.

RELATED: Hollywood Bromances

DiCaprio has donated two tickets to one of his upcoming red-carpet premieres, as well as passes to the afterparty. The lucky winner and guest will then get the chance to pose for photographs with DiCaprio during a brief meet-and-greet session.

RELATED: Hottest Dudes in Suits

The Charity Buzz auction, which ends on Feb. 9, is expected to fetch as much as $25,000 for the J/P Haitian Relief Organization.

Penn founded the charity to help Haitian families rebuild their lives in the wake of the devastating 2010 earthquake.

RELATED: Sexiest Couples of 2011