Credit: Dominique Charriau/

Mary-Kate Olsen is back on the market.

The actress-design mogul, 23, has split from boyfriend Nate Lowman, has confirmed.

Asked if she and Lowman are still an item, her rep tells Us, "No, they are not. It’s been a while."

Olsen and Lowman began dating in 2008 after meeting through mutual friends.

Last year, her rep told Us that tabloid rumors that the two are engaged were "untrue."

Olsen is currently attending shows at London Fashion Week.