Emma Watson stepped onto the red carpet last night at the premiere of her new movie 'Perks of Being a Wallflower' in a sheer layered dress, but we don't think the star realised just how sheer her sexy gown was as accidentally flashed her nipple.
The 'Harry Potter' star looked every inch the sophisticated star as she posed for photographs at the Los Angeles premiere, that is until the 22 year-old's mischievous boob decided to work it's way out of her dress, with only a nipple cover maintaining her modesty.
Watson looked mortified as she noticed the wardrobe malfunction and quickly rearranged her delicate dress. We're not surprised the star suffered a nipple slip having chosen such a risque choice for the red carpet.
Ooops! Emma flashes her nipple of the red carpet, (Splash News)
Clearly Emma, who stars as a shy high school student in the movie, had no intention of being a wallflower for the evening. The actress, who makes her graduation from child star to full blown Hollywood actress in the movie, should be used to getting naked by now after stripping off in the film.
Emma Watson notices nipple slip at 'Perks Of Being A Wallflower' premiere, (Splash News)
Her and co-stars Logan Lerman, Mae Whitman and Ezra Miller indulge in a scantily clad dance during a screening of 'The Rocky Horror Picture Show'. Speaking of the scene Emma admitted she had to act pretty hard during the saucy number, just to mask her nerves.
She told E! Weekly last week:"It doesn't show but I was absolutely terrified."
We wonder what is more terrifying stripping on screen or a nipple slip? It isn't the first time Emma's nipples have made an appearance on the red carpet either.
The star was left red faced an appearance earlier this year when her lace dress showed more than she intended! We think the cheeky star might secretly enjoy a little flash!
Does She Never Learn? Emma Watson's Other Nipple Flash