Chelsy Davy looked slinky in a **** satin dress as she joined a host of celebrities at the VIP premier of Burberry's new Christmas advert tonight.

The 30-year-old braved the November cold with a thigh-high-split dress with a plunging neckline, and halterneck straps, that showed off her toned arms and shoulders.

Prince Harry's old flame joined some of the biggest and best British names including Naomi Campbell, Rosie Huntington-Whitely and Romeo Beckham at the fashion house's flagship store in Regent Street.

Although Chelsey doesn't star in the Burberry ad campaign like many of the other guests, she used the opportunity to show off her style credentials in a silky black dress which showed off her figure.

Accessorising with a gold necklace, rings and charm bracelets, and a chain-mail edged envelope clutch, she did bring a leather jacket, but carried it with her bag despite the winter weather.

Chelsey had stiff competition in the **** stakes though, with Rosie Huntington-Whiteley dazzling in a provocative ensemble.

The model, who does star in Burberry's festive film, showed off her impressive figure in a skimpy satin body, which she teamed with a semi-sheer skirt and a pair of thigh-high suede boots.

Rosie teased her hair into loose waves and sported simple make up, so it didn't detract from her captivating outfit.

Her campaign co-star Naomi Campbell opted for an all-pink outfit - arriving in a rose suede jacket showing off a slither of her berry dress underneath.

And of course the model of the moment Romeo Beckham was on hand to celebrate his appearance in the film too.

The 13-year-old looked incredibly dapper in a navy suit with a matching skirt and tie as well as a polka dot Burberry printed scarf.

Downton Abbey's Michelle Dockery was one of the first of the cast to arrive and made her entrance wearing Burberry of course.

The 33-year-old actress was sporting a chic plum coat, simple black jeans and a pale pink jumper for the evening.

The campaign which was shot by Mario Testino and celebrates the 15th anniversary of Billy Elliot with an all British cast and begins with original footage from the 2000 film, as well as the original soundtrack - ‘Cosmic Dancer’ by T Rex - by permission of Working Title.

World-renowned photographer, Mario, also shot a separate stills campaign featuring Romeo, Naomi, Rosie, and James that will run across print and digital titles.

Speaking about the campaign, Christopher Bailey said: 'Billy Elliot is an incredible film full of so much joy and energy, so it was a real thrill and a great honour to be able to celebrate its 15 year anniversary through our Festive campaign.

'It was also a huge privilege to work with such amazing and iconic British talent – the cast are quite simply some of the biggest names in film, music and fashion and it was so much fun working with them all to make this special film.'

Burberry will no doubt be hoping for a boost thanks to Romeo Beckham.

At the start of the year, it was reported that thanks to his last Burberry Christmas advert, sales of the brand's classic £1,500 trench coats shot up a substantial 10 per cent.

The fashion label credited the then 12-year-old son of David and Victoria Beckham for its rise in sales in the US, Europe and the Middle East after he starred in their Christmas advert last year.

The advert, which was first released in November, was the first ever Christmas campaign for Burberry and starred Romeo alongside 50 dancers all clad in the beige trench coats.

Such was his popularity in the film - called From London With Love - that it was watched nine million times after being released.

The original production of Billy Elliot established a legacy of charitable support for the local community of Easington, County Durham where the film is set.

Inspired by this, Burberry is making a donation of £500,000 to be split between two charities, Place2Be and the County Durham Community Foundation, that have projects focusing on reducing barriers to education, training and employment in the local area. This donation is made in recognition of each artists' participation in the campaign.

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