Renée flashes her legs - and then puts her foot through her dress - on the red carpet

Yet it might be hoped that Renée Zellweger, who plays her on screen, might have a bit more decorum.

As Zellweger strode onto the red carpet for the latest movie in London, a gust of wind carried her dress away revealing a rather severe split up her thigh.

Moments later, posing for photographers, she again unintentionally flashed when she bent down to rearrange the polkadot creation - now sopping wet from the rain - when it wound uncomfortably around her leg.

The 38-year-old actress has lost so much weight in recent months that she joked that the floor-length gown she was wearing last night weighed as much as she did.

As she traipsed along the carpet at the opening of Bee Movie in a Caroline Herrera dress in pouring rain, she joked: "It is soaking wet. I am like a sponge.

"My dress weighs another six stones."

But she appeared to get offended when it was suggested her curves had disappeared.

She said brusquely, pulling a face: "Are you telling me my curves are absent? I think I am doing very well, thank you very much.

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Renee joked her dress weighed as much as she did, before making an adjustment to her troublesome polkadot gown

"I don't have a fitness regime as such, it is more of a lifestyle thing. It is about keeping my sanity."

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Asked whether she was dating Sir Paul McCartney after they were spotted enjoying dinner together recently, she became coy, giggled and blushed and refused to answer.

She would only say: "I have not seen him since I have been in London."

Renee and Sir Paul McCartney on a date in August 2007