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Shockingly, Sienna Miller has wasted little time moving on from Rhys Ifans.

The British actress – who is busy filming G.I. Joe: Rise of Cobra – is reportedly getting cozy with Balthazar Getty. Yes, the same guy that’s still married and welcomed his fourth child into the world in October. Balthazar is an heir to the Getty Oil fortune.

Sienna Miller and Balthazar Getty are a rumored couple no one really cares about.

A source told Great Britain’s The News of the World that the couple is trying to keep their affair quiet:

“They daren’t go out together, so they spend most of their time inside. When they do leave, they go separately.”

Sorry, Sienna and Balthazar. You can’t get anything past us!