AceShowbiz -

Several photos of Sienna Miller getting cozy with her alleged new boyfriend, identified as George Barker a.k.a. DJ Slinky Wizard, have hit the web. Those pictures, which show the pair cuddling, were taken while they were taking a boat ride in Ibiza, Spain on Thursday, August 13.

Sienna, as apparent in the snaps, was wearing a white bikini, while George was spotted baring his chest and wearing sunglasses. The twosome was seen all smile. Celebrity Mania has the reported pics.

In related news, Sienna reportedly is taking her relationship with George very serious despite the fact that they haven't been dating for long. A source tells The Mirror the actress 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."

Sienna Miller was previously engaged to actor Jude Law. She called off their engagement after dating him on and off following his revelation that he has cheated on her with his children's nanny. Most recently, Sienna broke up from actor boyfriend Balthazar Getty. She has publicly acknowledged to have made a mistake by dating him while he was still a married man.