Clapton and The Police will headline the London event

Clapton will lead the first night of the two-day event and will be joined by special guests John Mayer and ex-girlfriend Sheryl Crow.

The Police will top the line-up on the second night, with KT Tunstall and Starsailor also on the bill.

The gigs are on 28-29 June with tickets on sale on 1 February. It is part of Hard Rock's Ambassadors of Rock Tour.

'Amazing'

The concert will mark Clapton's first headlining gig at Hyde Park for more than a decade.

"We are very excited about this year's Hard Rock Calling event as we have two amazing headline acts, following on the tradition from the past two years which saw Roger Waters, The Who, Peter Gabriel and Aerosmith perform," said Toby Leighton-Pope from organisers Live Nation.