Calvin Harris for T in the Park

Calvin Harris is the latest surprise addition to the line-up announced for this summer's T in the Park.

The new was broken over Twitter during their #asktitp session where the festival account asked if he'd like to play and the 'Bounce Bounce' singer replied "yes". He's confirmed as headliner of the BBC Radio 1 Stage. Also confirmed is the arrival of this year of Arcadia's Afterburner, the fire-breathing extravaganza & the place to party late in Sunset Strip, and more details of Kraftwerk's 3D show which will take place in the King Tut's tent and glasses will be provided.

Earlier today Editors, Yeah Yeah Yeahs, Frank Turner, Chvrches, Stereophonics, Dizzee Rascal, Chase & Status, Bastille, British Sea Power, The Courteeners, Deacon Blue, Disclosure, Eats Everything, The Fratellis, Frightened Rabbit, The Heavy, Hot Natured, Imagine Dragons, Jackmaster, Labrinth, The Lumineers, Miles Kane, Modest Mouse, Modestep, Nina Nesbitt, Noah and the Whale, Ocean Colour Scene, The Original Rudeboys, Peace, The Proclaimers, Rudimental, The Strypes, Tom Odell, Twin Atlantic, The View, Villagers, and The 1975 were confirmed.

Organisers are set to unveil more acts at 8pm tonight to join headliners Mumford & Sons, Rihanna and The Killers, plus Kraftwerk, Emeli Sandé, The Script, Two Door Cinema Club, alt-J, Paloma Faith, Jake Bugg, Of Monsters and Men and Azealia Banks. Plus Slam Tent acts Richie Hawtin, Adam Beyer, Seth Troxler, Ben Klock b2b Marcel Dettmann, Slam, DJ Sneak, Derrick Carter, Mark Farina, Nina Kraviz, Claude Von Stroke, Eats Everything, Jackmaster, Joy Orbison, and Silicone Soul.

eFestivals will have an exclusive filmed interview recorded with Festival Director Geoff Ellis online shortly.

For the line-up details, as available, please click here. Expect a line-up of around 180 artists playing over 11 stages.

T in the Park will be celebrating the milestone of its 20th year back at Balado in 2013 from Friday 12th until Sunday 14th July with early entry available on Thursday 11th July.

The festival also offers large camping areas, as well as other attractions, including a large funfair, comedy tent, silent disco, stalls, and food markets.

Full priced tickets will go on sale 9am on Friday 22nd February, and eFestivals will have links to buy them then.

Tickets for T in the Park 2013 will be priced as follows:

A full weekend camping ticket (Fri-Sun arena access) £194
A full weekend with Thursday camping (Thurs - Sun) £205
A weekend (Fri-Sun) with no camping £184
A Saturday or Sunday day ticket £82.50
Friday only £75

No under 5s. Under 16s must be accompanied by an adult 21+ with a full priced ticket.

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