London, Aug 12 - British actress Sienna Miller is dating a disco jockey named Slinky Wizard.

The 'G.I. Joe: Rise of the Cobra' star has been seen enjoying intimate dates with George Barker, a 'psychedelic trance' DJ who insists his friends call him by his alias, reports contactmusic.com.

The 27-year-old actress met Barker earlier this year and took him to the Secret Garden Party music festival last month and since then, they have been meeting in secret and are reportedly busy planning their first holiday together.

'Sienna and George is still a pretty casual, low-rent thing but they're both really happy. George is a good, all-round guy and they have friends in common. He's not famous and isn't interested in fame,' said a source.

'George is really into his music and has been introducing Sienna to new stuff, and has even given her a go on his decks. They've talked about a holiday together and Ibiza has been discussed. It's early days but things are looking great,' the source added.