HOLLYWOOD: Charlize Theron is the sexiest actress who has posed nude, according to exports.

RadarOnline.com roped in renowned photographers Bradford Rogne and Helene DeLillo to rank 12 of the sexiest of female thespians who have left nothing to the imagination. And the duo combined their years of expertise behind the lens to choose ''Monster'' beauty as their top pick.

The South African beauty's breakthrough role in the steamy ''2 Days In The Valley'' was coincidentally her first nude foray too.

"She's the ultimate old school beauty with a modern edge. She is captivatingly different in every picture," Fox News quoted DeLillo as saying.

Rogne added: "With a face like that, she doesn't need rock hard abs." At the second position was Jenny McCarthy, who has gone from MTV, to Playboy to become one of Oraph's christened gurus. Rogne said: "(McCarthy) looks amazing, even after having a child."

DeLillo thinks that it was the right choice for her to pose nude, as she looks great from every angle and is "a favorite sexy funny girl."

Pamela Anderson has been chosen as the third best actress to appear nude.

"Though the size of breasts may frequently change, she remains a beauty," said Rogne.

DeLillo thinks that she "transformed the bikini stereotype from skinny to hottie lifeguard," adding serious proportions to the classic frame.

Rounding off at fourth and fifth position were the sexy Carmen Electra and ''Ghost'' beauty Demi Moore, respectively.