Mary-Kate and Ashley Olsen didn't waste any time heading out to celebrate their 21st birthday. On Wednesday, the twins hit the Beverly Hills Hotel and
then went to Chateau Marmont for a private dinner. "There were about 20
people there — very close family and friends," a witness tells In Touch.
"When the girls walked in, they both looked great and very happy."
The smiling guests laughed and chatted at the table, decorated with white
linens, votive candles and small bouquets of pink and white roses. A cake
was brought out to MK and Ashley and everyone sang "Happy Birthday."
"They were both taking pictures of each other and laughing the entire time everyone was singing," says the onlooker. "They poured champagne and each person at the table got up and gave a toast."