SCOTS rockers Biffy Clyro and DJ Calvin Harris are two of the stars who will perform at T in the Park.

They will share the bill with Arctic Monkeys and Paolo Nutini, who have already been confirmed for the three-day festival at Balado in Kinross-shire.

Other big acts include Pharrell Williams, The Manic Street Preachers, Pixies, Ed Sheeran, Ellie Goulding, Jake Bugg, Rudimental and Disclosure.

Around 85,000 people are expected to flock to the ­annual music celebration, taking place from July 11-13. For the first time there will be a full day of performances on Friday starting at noon.

Simon Neil, singer and guitarist with fan favourites Biffy Clyro, said: "Genuinely T in the Park has shaped our lives in more ways than just our experiences of ­performing there.

"We wouldn't be here, ­doing this now, if it wasn't for playing T in the Park.

"To headline it finally is amazing - it just feels poetic to be headlining on our 10th time."

Calvin Harris said: "Last year was incredible, so I can't wait to be back this year. It's going to be amazing."

Festival director Geoff ­Ellis said it would be a "very special weekend".

He added: "Every year we ask our audience which acts they'd like to see at T in the Park, and we're thrilled to have some great acts joining us in Balado once again this summer."

Tickets go on sale at 9am on Friday from www.tin