A bit of a boob for Cheryl Cole at her movie premier

She’s known for her impeccable fashion choices, but last night Cheryl Cole came unstuck at a glitzy film premiere when her stick-on bra came free and popped out of her dress.

The singer seemed ­oblivious to her wardrobe ­malfunction as she carried on smiling in her floor-length cream and white Victoria Beckham gown.

Cheryl, 28, attended the ‘What To Expect When You’re Expecting’ premier in London last night, where the star takes on her first acting role in the film – appearing as a judge in a celebrity dance-off competition.

The former X Factor judge said: “This is a big night for me.

“It’s nice to bring the film back to my country. I’d love to be offered more acting.”

What To Expect When You’re Expecting also stars Cameron Diaz, Jennifer Lopez, Dennis Quaid, Chris Rock and Glee’s Matthew Morrison.

Cameron Diaz said of Cheryl: “She’s talented, and she’s so lovely and I think of course this is the beginning of many (films) for her.

“I’m sure she can do whatever she wants to.

“She really did us a huge favour by coming in and letting us sequester her for a couple of days and take her out to an old abandoned warehouse in Atlanta and make her act for us.”

The Girls Aloud star carried a Sergio Rossi bag and wore Giuseppe Zanotti shoes at the BFI Imax cinema premiere on London’s Southbank.