The twins, who turned 21 last Wednesday, June 13, enjoyed their party with Joaquin Phoenix, Olivier Martinez and Kirsten Dunst, among others. During the party, the sisters danced to retro music, such as hits from Blondie and the Kinks.
According to FemaleFirst, Ashley said, "I would like to thank everyone who came out tonight to celebrate with me. I hope we will have many more happy memories this next year. Mary-Kate – no one could understand me the way you do. Nobody could relate to me the way you do. In fact no one could even tolerate me the way you do!"
Mary-Kate spent the whole evening beside her boyfriend, Max Snow, and later jumped into the pool with all of her clothes on.
A few days later, the twins shared an intimate dinner with their family and a few friends at Hollywood’s Chateau Marmont.