Brangelina to kick off Olympic party season in London

(CBS/AP) While the Olympic opening ceremony is almost here, and celebrities have already started to toast the Games in London.

Brad Pitt and Angelina Jolie are among the stars expected at London's Victoria & Albert Museum on Wednesday night for a charity gala honoring boxing great Muhammad Ali.

Pictures: Sports for Peace Ball
Pictures: Angelina Jolie
Pictures: Brad Pitt
Complete Coverage: London Olympics 2012

The 70-year-old boxer is expected to attend the Sports for Peace event, while other rumored guests include soccer star David Beckham.

Tickets started at 2,500 pounds ($3,900) and will raise money for the educational Muhammad Ali Center and for research into Parkinson's disease.

British newspapers are reporting that Ali, who has battled the degenerative condition for almost 30 years, will have a role in the Olympics opening ceremony on Friday.

Ali won gold at the 1960 Rome Olympics when he was known as Cassius Clay.