Mary-Kate Olsen isn't in a relationship with the mystery man she was spotted with earlier this week, but a source tells ET she is dating.
The fashion designer split from Olivier Sarkozy in May, after five years of marriage. «She's single and having fun,» the source said of Olsen, noting the male companion she was photographed with is just a friend. «She's not seriously with anyone, but she's dating.» According to ET's source, Olsen is back in New York City and staying in the Upper East Side after spending time in the Hamptons this summer. «She's doing great and seems happier than she's been in a long time,» the source shares.
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