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Muhammad Ali gala starts Olympic party season

Muhammad Ali attends the Sports For Peace Fundraising Ball at The V&A on July 25, 2012, in London. Ian Gavan/Getty Images

(CBS/AP) Muhammad Ali was the star of a London charity gala Wednesday that set off the Olympic party season. Brad Pitt and Angelina Jolie failed to make a much-anticipated appearance on the red carpet at the Sports for Peace fundraiser.

Pictures: Sports for Peace Ball
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Sports figures including Formula One driver Lewis Hamilton, tennis star Boris Becker and boxer Wladimir Klitschko, along with British celebs such as rocker Bob Geldof attended the party and dinner at the Victoria & Albert Museum in honor of the 70-year-old boxing icon.

"From an athlete he became a peacemaker, he became a global warrior and just a spokesperson for the right causes," Becker said. "He has had just an incredible life."

Ali was the guest of honor at the event, which was raising money for the educational Muhammad Ali Center and for research into Parkinson's disease. Ali has battled the degenerative brain condition for almost 30 years, and makes only rare public appearances.

But British newspapers have reported the former world champion might play a role in the Olympics opening ceremony on Friday.

Maybe, said his brother, Rahaman Ali.

"There's a possibility," he said. "He makes decisions at the last minute."

Muhammad Ali won gold at the 1960 Rome Olympics when he was known as Cassius Clay. He became a divisive figure in the 1960s United States after he converted to Islam and refused to be drafted for service in the Vietnam War -- for which he was stripped of his heavyweight title. He remained defiant, regained the title and became known as, simply, "The Greatest."

Geldof, the famously grouchy Irish musician and charity campaigner behind Live Aid, said Ali was the rare athlete who had made a difference in the world.

"Muhammad Ali was intensely political, and changed the whole agenda," Geldof said. "He did it with the same bravery he did in the ring."