The wow factor: Little Mix get a red carpet make-over and switch their casual fashion style for some grown up glamour

By J J Anisiobi

Last updated at 11:26 PM on 16th November 2011

First they changed their name and now they have changed their look.

The X Factor's Little Mix looked like a different group altogether as they arrived at the UK premiere of The Twilight Saga: Breaking Dawn Part 1 at Westfield Stratford City, in east London.

Under the watchful of eye of their mentor, Tulisa Contostavlos, the girl band hit the red carpet looking like they had already won the singing competition.

Looking good: Tulisa Contostavlos (centre) with Little Mix (left to right) Leigh-Anne Pinnock, Jesy Nelson, Jade Thirlwall and Perrie Edwards arriving for the UK premiere of The Twilight Saga at the Westfield Stratford City

The new mature look for the girls was a departure from the slouchy clothes viewers are used to seeing them perform in on the ITV show.

19-year-old Leigh-Anne Pinnock wore a black mini dress with thick gold lining and her red hair was pulled up elegantly.

Jesy Nelson, 20, who also has red hair, opted for a black sequined play-suit which she accessorised with a large belt and over-the-knee socks.

Back in the day: Little Mix on the X Factor wearing their normally casual outfits

Jade Thirlwall, who has been finding the criticism of her weight difficult to cope with, cut a trim figure in a navy blue dress with chiffon arms.

The 18-year-old is the youngest member of the band but looked full of confidence as she took to the red carpet.

Blonde Perrie Edwards, 18, wore a classic little black dress by Versace with gold detailing to complete the transformation of the group.

They have a good teacher: Tulisa looked great in a all black ensemble

They have a good teacher: Tulisa looked great in an all black ensemble combining leather and feathers

Top presenter: Caroline Flack, in a velvet playsuit, was without her partner in crime Olly Murs

X Factor judge Tulisa continued the dark colour scheme by wearing a feathered skirt and a black leather top.

Xtra Factor host Caroline Flack also attended the premiere and wore a dark blue velvet play-suit with a white baby doll collar but there was no sign of her sidekick, Olly Murs.

Kelly Rowland's three girls, Janet Devlin, Misha B and Amelia Lily attended but their mentor was in Manchester at a BBC Children In Need dinner.

Attending blockbuster movie premieres has become somewhat of a staple for X Factor contestants as last year's finalists went to see the final Harry Potter film and got to meet Daniel Radcliffe.