Sienna Miller has been secretly dating an unknown DJ called Slinky Wizard, according to reports.

The 27-year-old actress is understood to have met Slinky, real name George Barker, earlier this year.

The reported couple are said to have partied at last month's Secret Garden Party festival in Cambridgeshire and are also apparently planning their first holiday together.

“Sienna and George is still a pretty casual, low-rent thing but they’re both really happy,” a source told the Daily Mirror.

“George is a good, all-round guy and they have friends in common. He’s not famous and isn’t interested in fame.”

Skinky owns Flying Rhino Records, which is based in near Miller's country retreat in Gloucestershire.

The source added that Slinky had been introducing Miller to new music and has “even given her a go on his decks”.

Miller's previous partners include actors Jude Law and Rhys Ifans, and a reported romance with married billionaire, Balthazar Getty.

The actress is currently promoting new movie GI Joe, which is in cinemas now.

Sienna Miller