Sienna Miller has introduced her family to her new boyfriend.

The "G.I. Joe: The Rise of Cobra" star – who began dating George Baker, a "psychedelic trance" DJ known as Slinky Wizard, last month – took her latest beau to a pool party at her step-mother Kelly Hoppen's villa, in Ibiza, Spain.

A source said: "Sienna and George are really quite besotted."

"They haven't been dating for long but decided to just go for it and get away for a sunshine break."

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"Sienna and her step-sister Natasha had organized a surprise 50th birthday for Kelly, and Sienna invited George along too so they could meet informally over a few glasses of champagne.

"He seemed pretty nervous about meeting the family but it went really well, and he was utterly charming to everyone."

At the party - which was also attended by Stephen Dorff and British comic star David Walliams - singer James Blunt tried to flirt with Sienna, but the blonde beauty rejected his advances.

The source added to Britain's Daily Mirror newspaper: "James Blunt didn't realize Sienna was spoken for and seemed keen on getting to know her better – until George got wind of it, and swooped in to rescue her."

The 27-year-old actress – who has previously dated Jude Law, Rhys Ifans and Balthazar Getty - met George earlier this year and took him to the Secret Garden Party music festival last month.

Source: BANG Showbiz