Emma’s taken pretty extreme precautions to make sure that she doesn’t get too, er, cold at her new film premiere

One of the dangers of starring in a film called The Perks Of Being A Wallflower is that the name lends itself a million different kinds of jokes. We’re not going to list all million of them, because we don’t want to take up too much of your time. But here’s a clue: the majority of them involve the adjective “perky”, followed by the name of the film itself, and then a photo of Emma Watson’s left nipple.

The Harry Potter actress who doesn’t want to be known as “the Harry Potter actress” was at the premiere of her new film last night in Los Angeles, when her dress slipped by approximately 2.75 milimetres, and exposed her to the whole world a group of over eager photographers. Who probably made leering noises while rubbing their hands on their thighs, before selling the picture to all and sundry.

Like us.

Fortunately for Emma, not only is her dress very pretty and ethereal, but somebody (probably her dad) warned her about the risks she was taking with the film title, and handed her something which Internet seems to believe is called a “nipple daisy”, which means that we can’t actually see very much of her breasticles anyway.

The adventures of Emma’s nipple daisyView gallery

Unfortunately for Emma, after staring quite intently at the picture for a while, we’ve deduced that it actually doesn’t look like a daisy at all. And instead just resembles one of those things that you use to stick air-fresheners in the shape of Christmas trees to your car windscreen.

The premiere turned out to be quite a big affair, with a lot of celebrities strutting along the red carpet in order to see the film for free and drop popcorn down their tops. And while Emma’s new BFFs Kristen Stewart and Jennifer Lawrence couldn’t attend, Ginny Weasley Bonnie Wright made it along to support her friend. She might have been wearing nipple daisies too. Maybe it’s a thing.

Have a look at more photos of Emma and her not-so-perky-bits above.

And then see the best celebrity nip slips of all time…