Matthew Settleand his wife Naama Nativ on September 12, 2009 in New York City. Credit: Amy Sussman/Getty Images

Spotted: Gossip Girl's Matthew Settle -- with other women.

"Divorce is imminent," a source says of the actor, 40, and his wife, model Naama Nativ (daughter Aven was born last March).

His wedding ring was off during NYC fashion shows February 11 and 12. (A rep for the actor could not be reached for comment.)

What's more, he was seen squiring a mystery lady at a party at club SL in NYC the day before Valentine's Day.

Says an insider, "The marriage was difficult for him. His priority now is his daughter."