In the most convincing sign to date of their rekindled romance, Sienna Miller and Jude Law are enjoying a summer holiday together this week.

Sparking further speculation that the couple - who ended their relationship four years ago - are back together, the Hollywood screen stars have been spotted enjoying some quality beach time in Barbados.

Sharing their December birthday celebrations - Sienna turned 28 on Monday while Jude turns 37 on Tuesday - the pair appeared completely at ease with each other as they bathed and chatted.

"Jude told his parents, children and his ex-wife over Christmas that he wants to make a real go of it with Sienna. He really wants it to work this time around," says a source.

Sherlock Holmes actor Jude, who spent December 25 with son Rafferty, 13, daughter Iris, nine, and seven-year-old Rudy - recently became father to daughter Sophia with US model Samantha Burke.

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