Elton John to Play at Andy Roddick's Wedding

According to People magazine, musician Sir Elton John, 62, is expected to perform at the wedding of tennis player Andy Roddick, 26.

"He's supposed to perform, and everyone's really excited," a source close to John said. John and Roddick know each other through charity work they've done together.

Roddick will be marrying swimsuit model Brooklyn Decker, 21, this weekend at Roddick's Austin, Texas home. Other celebrities expected to attend the wedding include tennis champions Steffi Graf and Andre Agassi, Marty Fish, James Blake and Julie Henderson.

Two years ago, John performed at the Andy Roddick Foundation's Charity Gala. Last year, in the Advanta WTT Smash Hits charity tournament, Roddick was a part of "Team Elton John," which was able to raise over $400,000 for the Elton John AIDS Foundation.