Mischa Barton's charity boob

(BANG) - Mischa Barton shocked guests at a children's charity event by accidentally flashing one of her nipples.

The actress experienced her wardrobe malfunction at the Save the Children event at New York's Lincoln Centre - where guests included former US President George Bush Sr. - on Thursday night (06.09.07).

One onlooker said: "Mischa was wearing a sparkly yellow dress and one of her nipples was blatantly showing! It was so not appropriate for Save the Children."

A representative for the 21-year-old actress denies she bared her boob, saying: "It didn't happen, because if it did, there would be a photo."

Mischa - who is about to appear as a sexy schoolgirl in new movie 'St. Trinian's' - recently revealed she is desperate to play a Bond girl in the next 007 outing, tentatively titled 'Bond 22'.

She said: "I'd love to be a Bond girl! What girl wouldn't? It's my dream."

(C) BANG Media International