Mischa Barton Held in a Psych Ward?

Mischa Barton has been hospitalized, per the recommendation of her doctor, her rep tells ET.

"Mischa lately has looked a little bit more disheveled," David Caplan, senior editor, People magazine says. "Her face is puffy -- that was attributed by some people to having her wisdom teeth out. But her looks really have changed lately compared to how she used to look."

Caplan adds that she is being evaluated by mental health professionals. Allegedly, she is being held under California's involuntary psychiatric hold law, after being taken away by police.