As Mischa Barton emerged from Mayfair's Whisky Mist at 2am this morning, it was hard to imagine she was once a sought after actress who broke countless hearts with her milky complexion in the hit US series, The OC.

It's reported the former Keds model was asked to leave the bar, after she and a close pal tried to enter a ladies cubicle together. Sources also revealed the star later attracted the attention of staff, after spending an unusual amount of time in one cubicle alone.

Mischa Barton leaving Mayfair's Whisky Mist with friends last night

Just last week the actress caused concern after arriving at the opening of the Harrods Summer Sale looking pale and drawn. Many blamed her less than flawless appearance on a previous late night out on the town with friends.

She was also spied looking equally frail during 2009 Paris Fashion Week, following an obviously determined battle to ditch the lbs. This came after photos emerged of the actress sporting a pair of unflattering shorts at Los Angeles' La Scala restaurant at the end of last year.

A scrawny Mischa at Paris Fashion Week in March 2009 (left), showing off her cellulite in 2008 (middle) and on the red carpet at the 2004 Teen Choice Awards (right)

But last night events didn't appear to dampen the star's spirits, as she managed to continue her evening at Bungalow 8.

So we can safely assume that any demure and ladylike appearances from Miss Barton in the near future is off the cards – for one more day at least.

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