Rihanna has prompted speculation that she is dating Pharrell Williams after he was seen leaving her hotel room.

The singer is reportedly dating the N.E.R.D star after he was seeing leaving her hotel several times during her stay in London recently.

Since she split from Chris Brown after he physically assaulted her in February, the Umbrella star was romantically linked to Lil Wayne's protege Drake, but the pair dismissed the rumours.

Now, however, reports claim she's seeing Williams.

A source told the Daily Mirror: "It's no secret that Rihanna and Pharrell have chemistry. And not just in the studio - they seem mesmerised by each other. But Chris will be gutted to learn he could have lost Rihanna to one of the sexiest men in music.

"Rihanna and Pharrell talk on the phone all the time and whenever she can get a break in her schedule she'll go and support him at a gig.'