It appears Miller’s ex-beau Rhys Ifans has every reason to think he was dumped for another man, with the Alfie star reportedly in a “serious relationship” with a married oil tycoon.

News of the World has revealed that Miller is now dating oil millionaire and father-of-four Balthazar Getty. The pair have been spotted together a number of times since Miller’s split from Ifans, and Getty’s wife has since fled the country with their children, devastated at her husband’s infidelity.

A source explained that Miller and Getty had hoped to keep their affair a secret. “They went to great pains to find a place where they thought nobody would find them,” the source said. “They daren’t go out together, so they [spent] most of their time inside. When they do leave, they go separately.”

Apparently, Miller was so intent on keeping her love affair with the oil heir secret from the press that she encouraged the rumours that she was dating former flame and co-star Matthew Rhys, even though the rumours angered Rhys Ifans, her latest dumpee.

According to a source, 33-year-old Matthew Rhys was the one who introduced Sienna – while she was still dating Ifans – to Getty. The pair first met through Rhys’ doing last summer at the Chateau Marmont hotel.

“Sienna got to know Balthazar through Matthew and they hit it off. In the past three months they have grown incredibly close,” the source said.

“Getty even secretly flew to London and Prague to be with Sienna to get to know her even better. And she’s spent this week in a Hollywood house with him.

“Even though Balthazar loves his wife and children he cannot stay away from [the actress]. But Rosetta found out about them and has now fled to Italy.

“She can’t believe her husband could do this to her. The whole family now know and everybody is devastated.”

Getty’s family aren’t the only ones who have been hurt by the secret affair. Rhys, Miller’s Edge of Love co-star, is said to feel slightly put-out by Sienna using him to keep the press off her back. He feels like an idiot, a friend said, and isn’t happy that he’s been roped into the mess his former girlfriend has created.

“Sienna tried to fight her feelings for Getty because she didn’t want to cause Rhys any more pain,” the source added.

“The whole time both of them have encouraged rumours she had dumped Rhys for Matthew because they didn’t want anybody to know the truth.

“Now Matthew feels a bit of an idiot—his friend and co-star Balthazar has nicked his old love. He’s angry he’s been caught up in the whole mess.”

[Source]