The former ‘O.C.’ actress who was placed under an involuntary psychiatric hold in Los Angeles earlier this year – is dating aspiring actor Leo Wyndham.

A source said: “They’ve been together for over a month now.

“Leo is out there trying to make it as an actor, so they move in similar circles. He’s been an extremely positive influence on her.”

It is understood the couple, both 23, met in New York after Mischa Barton came out of hospital.