Published: 07:31 BST, 11 September 2012 | Updated: 17:43 BST, 11 September 2012
She's the somewhat shy and retiring star of upcoming movie The Perks Of Being A Wallflower.
But Emma Watson was anything but a wallflower at the Los Angeles premiere of the movie last night (Monday) when she suffered an embarrassing wardrobe malfunction on the red carpet.
The 22-year-old actress found that her backless dress was slightly too revealing as she posed up for photographers, with the side of the outfit slipping to reveal her breast.
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Hardly a wallflower! Emma Watson had a wardrobe malfunction on the red carpet at the premiere of The Perks Of Being A Wallflower in Los Angeles last night (Monday)
Dare to bare: Emma found that the backless dress proved slightly too revealing on the red carpet
Luckily, Emma had thought ahead and was wearing a nipple daisy to protect the majority of her modesty, quickly correcting the malfunction before happily posing up on the red carpet once again.
Other than her fashion error, Emma managed to look stunning for the event in the nude dress, which featured three layers of lace and highlighted her waif-like figure.
To complement her ensemble, Emma opted for simple but effective make-up, with classic red lipstick and dark eyeliner.
Best front forward: Emma clutched her friend's hand as she appeared oblivious to the red carpet mishap
Nearly nude: Emma then caught sight of the error and corrected herself before posing for more photos
That's better! After a quick adjustment, Emma looked picture perfect in the stunning gown on the red carpet
The British actress finished her outfit off by wearing her hair slicked back away from her face, and went jewellery-free to ensure all the attention was on her showstopping gown.
The film is a coming-of-age story based on the best selling novel by Stephen Chbosky, and sees Emma star alongisde Logan Lerman (3:10 to Yuma) and Ezra Miller (We Need to Talk About Kevin) in the story of an introvert freshman who is taken under the wings of two seniors.
Emma plays the role of Sam, Patrick's (played by Miller) free-spirited step-sister, whom Charlie (played by Lerman) falls for.
Nice face: The Harry Potter actress got everything right on her big night, including her make-up
Lady of the night: Emma dutifully signed autographs for loyal fans
Drama queen: This snapshot shows a funny side to Emma as she bolts down the red carpet
After nine Harry Potter films, this is the first major role for Watson.
She had a smaller role in last year's My Week With Marilyn, and has voiced Princess Pea in the animated Tales of Despereaux.
The movie is also a first for director Stephen Chbosky, who wrote the novel and has written 22 episodes of the TV series Jericho.
The night for lace: The Vampire Diaries actress Nina Dobrev and songbird Rumer Willis both opted for dress with lace inserts
Black and white: Former Harry Potter star Bonnie Wright and Dancing With the Stars Peta Murgatroyd
The usual mash-up of A through D-list celebs turned out for tonight's premiere.
Rumer Willis arrived looking sultry in a floor-length black gown with a daring double split to her thighs.
Actress Nina Dobrev looked stunning in a red strapless dress, which had an unusual lace arm piece.
Wearing the pants: Actress Shailene Woodley and Former Olympic gymnast Shawn Johnson
Racy: Kate Walsh showed some skin in her black dress with sheer sleeves and back
Dancing With the Stars pro Peta Murgatroyd took a spin in a cream dress with black and orange geometric shapes.
Twilight's Bonnie Wright, meanwhile, looked gorgeous in a cream shirt over black pants and heels.
Former Olympic gymnast Shawn Johnson hit the red carpet in tight skinny jeans and a silver sequined top, while Private Practice star Kate Walsh opted for a racy black dress with sheer sleeves and a very low-cut back.
Interesting attire! Emma rocks her sequins for The Perks Of Being A Wallflower