The tennis star may have just pulled off the best celebrity wedding crash of all time.
While enjoying a day at the beach with fellow tennis star Caroline Wozniacki (who recently split with fiancé Rory McIlroy), the pair stumbled across some beachside nuptials.
Serena was happy to pose with the happy couple and their guests…all while wearing a leopard print g-string leotard!
Williams posted the evidence to her Instagram account, captioning one snap, "Wedding crasher!! Congrats".
The tennis great is known for her fashion choices both on and off the court, and her wedding leotard was no exception.