Ed Sheeran has revealed to his fans that he has been working on a collaboration with Pharrell Williams.

The 22-year-old singer-songwriter made the announcement via Twitter telling fans that he and the Blurred Lines hitmaker had spent two days in the studio together.

He said: "Finished up 2 days with @Pharrell. Sounding nuts”

However while Sheeran is busy working on his follow-up to his debut album +, he did not say if Pharrell will actually be featuring on his next album or if he was just writing and producing with the Lego House singer.

Speaking to The Oakland Press Sheeran gave some details about how his new album is sounding. He said: "It's definitely leaning towards more of a beat-heavy thing, definitely more hip-hop like.

"I try as much new stuff as possible; sometimes some of the things work and sometimes it's just an experiment. But I think I've evolved a bit more since I made the first record, which is a healthy thing."

Sheeran also recently revealed that songs he pitched for the Hunger Games: Catching Fire soundtrack were rejected.

Pharrell Williams has featured on the two best-selling singles of 2013 so far - Robin Thicke's Blurred Lines and Daft Punk's Get Lucky.