For the 20th anniversary edition of T In The Park, the organisers have booked two of the biggest (commercially speaking) artists of the year to headline the festival.

"Seems like only yesterday that the first band took to the stage at Strathclyde Park for our inaugural T in the Park in 94, now here we are in 2012 announcing 2 of the of the world’s biggest and best acts to headline our 20th edition," says festival director Geoff Ellis.

Those two artists in question are Rihanna and Mumford & Sons. They'll be joined by Alt-j, The Script, Paloma Faith, Jake Bugg and Of Monsters and Men.

The festival runs 12-14th July 2013 at Balado, Kinross-shire, and you can buy tickets this Friday (7th December) at 9am.