On an island in the sun, Mary-Kate Olsen and Ashley Olsen will have some serious fun!
When the fashion designers turned 29 Saturday afternoon, they didn't just celebrate by themselves. Instead, they invited their closest friends together for an Olympic-themed birthday party in the Hamptons.
Using the hashtag #OlsenOlympics, guests gave fans a preview of the day's festivities that included dunk tanks, fireworks and obstacle courses. But before partaking in any of the activities, friends had to wear either Team Ashley or Team Mary-Kate T-shirts.
Without further ado, let the competitions begin!