Mischa Barton let’s it all hang out.
Mischa Barton showed some nip when she stepped out for a night of partying in London, last night. (Unedited pic below)
The English born, former OC star, was looking the picture of glamour as she emerged from her limo for an evening at The Berkeley Hotel, in Knightsbridge.
However, she was soon left red-faced as her delicate lace halter-neck top failed the 21-year-old.
Barton is in London after signing up to appear in the new St Trinian’s film.

















