Olsen's most recent longterm relationship was with artist Nate Lowman, from whom she split in 2010.
The 23-year-old designer and her boyfriend, who began dating in 2008, haven’t been together for “a while,” her rep told Us Weekly.
Mary-Kate Olsen was spotted sporting a gold ring on her left ring finger Sunday, and rumors have been swirling about the accessory's implications for the designer, 26, and boyfriend Olivier Sarkozy, 43.
Olsen and the younger brother of former French president Nicolas Sarkozy got together in May 2012, and have been packing on the PDA ever since. This is a hard time for me." She added that she and Hilton were "not talking." Olsen and the son of Dream Works cofounder Jeffrey Katzenberg were together for about a year and split just before the "Full House" star began her stint at NYU in 2004.
Page Six broke the news of the fashion designer's newest fling Wednesday morning; a source tells the paper the pair have been seeing one another just over a month and that they're "head over heels." PHOTOS: Famous female entrepreneurs like MK & Ashley The once-divorced Sarkozy split from his last serious girlfriend, actress Stella Schnabel, in March.
On April 25, Sarkozy and Olsen attended a Knicks game together and hit the Hamptons over Memorial Day weekend.
is an American actress, fashion designer, producer, author, businesswoman and equestrian.
"MK is constantly complaining about boys not being mature enough for her," a source told Us Weekly last spring, explaining the age difference. Now being a businesswoman dominates her time, and she is rarely impressed with guys."When the Greek shipping heir moved on to Paris Hilton in 2005 after dating for several months, Olsen told W magazine, "I miss him and I love him and I don't speak with him anymore. "It was a mutual parting of the ways and amicable," a source told People. It's reasonable for her to start school fresh." Before than, Olsen was with Max Winkler, the son of "Happy Days" star Henry Winkler.
Though Olsen and Sarkozy are seventeen years apart (Olsen is 25), the source says their age differences suits her just fine.
PHOTOS: Celeb couples with huge age differences "MK is constantly complaining about boys not being mature enough for her," the source explains. Now being a businesswoman dominates her time, and she is rarely impressed with guys." A second source confirms Olsen and Sarkozy are dating and tells Us, "They are good for each other.