Athletes Do The Oscars: Serena, Aaron, Kraft ... And GRONK

Oscar time in L.A. ain't just for the (white) movie stars ... some of the biggest names in sports come out too .. and they were looking their best Sunday night.

Serena Williams, Aaron Rodgers, Robert Kraft and GRONK all took part in the Tinseltown festivities ... most opting for the Vanity Fair after-party in Beverly Hills.

So, who looked the best? Hard not to go Serena here ... but Aaron Rodgers seemed to have the entire media talking about his classic look ... and his smokin' hot date Olivia Munn.

But yeah, it was Serena ... check out the pics.