Sienna Miller vehemently rejects her 'Sleeparound Sienna' nickname.

The 'Factory Girls' actress - who dated Jude Law for two years and has been romantically linked to a string of men, including Daniel Craig, P. Diddy and Sean Bean - denies she is as promiscuous as people think.

She said: "I always hear things about me and different men. Is my nickname Sleeparound Sienna? I can assure you I'm not."

To add further weight to her claims, the 25-year-old star has rubbished rumors she is dating 'Notting Hill' star Rhys Ifans.

The 39-year-old actor recently moved into her London home, but Sienna insists their living arrangement is totally innocent.

She said: "He lives on a boat and it has flooded so at the moment he is sleeping on my sofa."

"I gave him a place to stay because that's what friends do."

Speculation the pair was more than just friends surfaced after they vacationed on the Spanish island of Ibiza last week. Sienna was spotted sunbathing topless in front of Rhys and reportedly even shared a passionate embrace with him as they waited in the airport for their return flight.

One vacationer said: "They were all over each other. Sienna kept nuzzling her head into his chest and he repeatedly kissed her lips and cheeks."

"I have no idea what she sees in him - he's so gangly. But Sienna is beautiful, very petite and just gorgeous."

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