Mary-Kate Olsen is back on the dating scene after splitting from her ex Olivier Sarkozy in May. The couple was married for five years and, after reportedly spending her summer in the Hamptons on Long Island, N.Y., she's back in New York City. "She's single and having fun," a source told Entertainment Tonight. "She's not seriously with anyone, but she's dating." The insider added, "She's doing great and seems happier than she's been in a long time." Olsen, 34, filed an emergency petition to file for divorce in April from Sarkozy, 50, but her bid was denied due to the moratorium put in place amid the coronavirus crisis.