The secret to Shane Warne's new look

Slimmed-down Shane Warne has lost more than 12kg in the past four months - and it's all down to diet shakes, says St Kilda pal Steven Baker.

Shane Warne, who's living in the UK with Hollywood heavyweight Liz Hurley, has been tucking into organic weight loss drink TaiSlim after being put onto it by the St Kilda hardman.

The king of spin wowed fans with a new look after being snapped in London, News Limited reported.

"I signed him up about three or four months ago on the diet system," Baker said.

"He loves the stuff, he's addicted."

Warne even had the supplement shipped to him while he was playing in the Indian Premier League.

The one-time chubby, cigarette-smoking Warne has been pictured in recent weeks sporting a slim figure and narrow face, but denies undergoing surgery or having been subjected to a strict regime by his health-fanatic girlfriend.

"I have always taken pride in my appearance and an attack on EH (Elizabeth Hurley) is unfair. I'm proud of how I look and worked my butt off for four months," Warne said on Twitter according to the Mail.

The Daily Mirror newspaper said Warne admits having had his teeth whitened and credits his good skin with the beauty creams endorsed by Hurley, the face of Estee Lauder.

"Warney is barely recognisable he is so thin and ladylike," an onlooker told the Mirror.

"He used to be a man's man and was really rough on the edges but all this has gone. He looks more like a waxwork these days."

Warne lives in Melbourne but has been a regular guest at Hurley's London home while he works as a commentator on the England versus India test series.