New Delhi, Aug 17 : Creating history with eight gold medals at 2008 Beijing Olympics, American swimmer Michael Phelps may have become the king of his female fans' hearts, but the woman who rules his heart is still a mystery.

However, the two names doing the rounds are Phelps' teammate Amanda Beard, who recently posed nude for an ad campaign, and a British model Lily Donaldson, reports Xinhua.

Amanda Beard, 26, is competing at her fourth Games and has won seven medals, two gold, four silver and one bronze, but none so far in Beijing.

She holds the world record for women's 200m breaststroke.

Lily Donaldson, 21, is one of the top models in the fashion world and took over as the younger face of Burberry from Kate Moss last year.

ANI