Her face is drawn, her cheeks are sunken and her collarbone is protruding sharply.
To the outside world she looks gaunt and unwell, but it seems in Hollywood the shockingly thin look is back in fashion.
The 23 year-old, who is 5ft 9, has slumped from a healthy size 12 to a size 6-8 in just six months.
Miss Barton made her name as the willowy blonde clothes horse in American teen drama The OC.
But when she left the show, she also left behind the skinny teen and got herself some curves.
Unfortunately, the roles began to dry up, and she then stripped off for an ill-advised nude scene in film Closing The Ring.
Last year Miss Barton – then a curvy size 12 - was snapped on holiday with cellulite on her legs.
However, the criticism for her new fuller figure appears to have got to her as she showed off a dramatically slimmer silhouette while attending the shows at Paris Fashion Week.
To continue reading the article, go to this page on DailyMail.co.uk.
Photo Source For Above Picture: DailyMail.co.uk
Actually, the pictures below were taken of Mischa out and about in Hollywood on February 10, 2009, and she doesn't look too skinny. She's just a thin girl. It's just amazing how much pressure Hollywood puts on these poor girls to stay paper thin.