Pike previously dated Atonement director Joe Wright and he proposed to her in 2008 on Lake Como. They had sent out save the dates to their wedding guests when Wright abruptly called things off. The Oxford University graduate also dated actor Simon Woods, who later turned out to be gay.

The actress plays the emotionally disturbed and manipulative Amy Dunne in Gone Girl. She credits her current partner Uniacke, a mathematical researcher and former addict, with helping her to shape her film characters.

"I have a very clever partner who’s got a very astute mind and is very, very well read and articulate and ruthless about how something I do might play out on screen," she told the Telegraph earlier this year. "My tendency is to identify with a character and imagine there is more on the page than there is. He’s quite good at putting a check on that."

"I feel very uncomfortable because people think I have walked into this profession through connections and looks," she added. "And they somehow think it’s easy – and it’s not f****** easy. I don’t have connections. And I didn’t have parents, or a social set, who had anything to do with the film industry."

'People have ridiculous expectations of marriage - separation is key to relationships' says ‘Gone Girl’ star Rosamund Pike