Keira Knightley is set to marry her rock star boyfriend James Righton.

The Pirates of the Caribbean actress has got engaged to the Klaxons keyboard player, whom she has been dating since April 2011, her representative has confirmed.

"I can confirm that Keira is engaged to be married to James Righton," Keira's spokesperson said. No other details about the engagement are known at this time.

James recently moved in to Keira's London home, which she bought following her split from long-term boyfriend Rupert Friend in December 2010. "Keira suggested the idea and he moved his stuff in a couple of weeks ago. They want to get a puppy. It's all pretty serious," a source said in April.

The couple have also recently been house-hunting for a country home.