No, it’s not Lindsay — she’s still sober, as best I can tell — it’s Mischa Barton’s kid sister, Hania, who went to rehab in February of this year.

MISCHA Barton’s younger sister, Hania, showed up at a Hollywood fashion show so wasted last weekend, designer Daniel Darhan told her she couldn’t walk the runway. Web site celebritybabylon.com also reports she was so “out of it” at the Troy Kingdom fashion show at club Area, she could “barely stand up. Her legs were like jelly. She was literally chewing on her lower lip.” When someone tried to snap a shot of her, Hania – who already has one trip to rehab under her belt – said, “No pictures, this [bleep] always ends up in the tabloids.” Her rep did not return calls.

Looks like Hania may have one or two more trips to Promises in her future. I’d do drugs, too, if my sister were Mischa Barton and I looked like this.