Mini-mogul Mary Kate Olsen has called it quits with her longtime boyfriend, Nate Lowman. A rep confirmed the breakup to Us Magazine Wednesday, telling the tab that the former couple broke things off “a while” ago. The National Enquirer cites sources who claim Nate and MK split before Valentine’s Day.

No other details were available.

The actress turned fashion designer, 23, began dating Lowman, 30, in 2008. Mary Kate — who accepted a Style Icon of the Year Award with sister Ashley at this week’s Elle Style Awards in London — has previously dated Greek shipping heir Stavros Niarchos and Maxwell Snow.