Photo gallery: Kanye, Ellen and A-Rod among celebrities at Open

The biggest matches at the U.S. Open are yet to come, but the lineup of celebrities attending the Grand Slam in New York has already hit the big-time.

A few of the biggest names in music, sports and film have been spotted at the Open, some to promote a charity (Usher), others because they're friends with the players (Gavin Rossdale and Gwen Stefani are old friends of Roger Federer's and frequently sit in Fed's player's box at Grand Slam events) and some to provide family support (Serena Williams and Brooklyn Decker). One thing is certain though: They all had better seats than you and me.

There have yet to be sightings of frequent U.S. Open attendees like Wood Allen, Jay-Z Jerry Seinfeld and Jack Nicholson, but oftentimes the big stars don't come around until late in the second week. You can bet if Federer and Rafa play in the final, the crowd at Ashe will put anything seen at a Lakers game to shame.

Click image to see photos of celebrities at the U.S. Open

Matthew Stockman/Getty Images

Sadly, though he's currently residing just five miles away from the USTA National Tennis Center, noted tennis fan Lil Wayne won't be able to make it to this year's event.

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