Blunt dating 'Office' star Krasinski

British actress Emily Blunt is rumoured to be dating The Office star John Krasinski.

According to Star magazine, Blunt recently had a romantic getaway with Krasinski at a ranch in California.

"They ordered room service, took long walks and spent every second together," a source said. "John really cares for Emily - he totally fawns over her. And she's loving the attention. She's a down-to-earth girl, but it's nice to be treated so well."

Blunt, who appeared in The Devil Wears Prada, split from singer Michael Bublé four months ago.

Krasinski plays Jim Halpert in the US version of The Office.