Sienna Miller has denied rumours that she is dating Josh Hartnett - or indeed Leonardo DiCaprio.

The actress was reported to have been spotted canoodling with Leo at a Los Angeles nightclub recently, and a source told People magazine that she was seen looking cosy with Pearl Harbour actor Josh at a hotel on January 16th.

"They sat side-by-side on a couch laughing and chatting for about an hour," the source told People magazine of Sienna and Josh, adding that he "held onto her thigh" as she stood in front of him and flirted.

However, a representative for the actress told Bang media that they were simply friends and were "just hanging out".

Sienna herself has poured cold water on the Leo rumours, insisting that she hadn't even seen him for a year and a half until the Golden Globe awards earlier this week, Metro reports.

"Absolutely no truth, I'm afraid to say," she reportedly told red carpet host Ryan Seacrest.

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