Nice dimples, Posh ... shame they're on your sun-kissed legs

With that pout permanently in place, there was no chance of dimples ever showing on Victoria Beckham's unsmiling face.

Maybe that's why they've turned up somewhere else.

And for a woman known to be rather particular about her appearance, there couldn't be any worse news.

As she arrived at a film shoot in the Hollywood Hills, Posh's legs, which she likes to show off as much as possible, appeared to display the classic signs of cellulite.

Leg up: the high maintenance star showed off unsightly saggy skin on her pins

Victoria maintains a very strict diet but rarely exercises, which could have affected the elasticity of her skin

The puckered skin can be clearly seen here on her left leg as she scales a set of steps . . . just when everything was going so smoothly in her drive to conquer America.

Hollywood is known for its incredible sunlight but what's a big draw for moviemakers is a big drawback for those with even the smallest imperfections to hide.

Seasoned stars are only too aware of the pitfalls and cellulite treatments and hours spent on stepping machines are big parts of life in Tinseltown.

Not quite the bees knees: Posh also shocked onlookers with her sunken thigh

The unfortunate picture, not sanctioned by her publicity machine, emerged as Mrs Beckham, 33, arrived at a film shoot for another TV project.

Her first offering, Victoria Beckham: Coming to America, a one-off special, was seen in the U.S. on NBC, attracting only 4.9million viewers. Shown here by ITV on Tuesday, it was beaten in the ratingsby a repeat of BBC crime drama Waking The Dead, although it did outshine Big Brother on Channel 4.

American critics were unimpressed by the show. The New York Post called it 'an orgy of self-indulgence' and described Mrs Beckham as 'vapid and condescending'.

Posh was preparing for a photoshoot at a rental property in Hollywood

NBC, however, seems happy about her pulling power.

Last night she was seen by millions more American viewers as a guest host for the network, introducing four comedies between 8 and 10pm.

'Network bosses were thrilled by Posh's show and thought she could bring a little humour to their comedy night,' said a source. 'They are already in talks about Posh appearing in other NBC projects.'