Frank Ocean and Rita Ora have joined the line-up for T in the Park, where Rihanna, Editors and Mumford & Sons will be headlining.

Frank Ocean and Rita Ora are set to perform at T in the Park.

The duo will join a list of top musicians in Balado, Kinross, from July 12 - 14 to perform at the annual music festival, along with acts Tyler, the Creator and Earl Sweatshirt - who have also joined the line-up.

This will be Frank's first appearance at the event, which is celebrating its 20th birthday, after winning both a Grammy and BRIT Award earlier this year.

Rita will be returning to the stage after performing at the festival last year and will be joining the likes of her good friend and "mentor" Snoop Dogg this time round.

Rapper Tyler, the Creator - leader and co-founder of LA collective Odd Future - will be showcasing material from his forthcoming album 'Wolf', while his good friend Earl Sweatshirt, 18, will show off his lyrical skills.

Other acts recently announced to be joining the schedule include Emeli Sande, Dizzee Rascal and Editors, who "can't wait" to share their new music.

Drummer Ed Lay said: "It is our pleasure to be coming back up to T in the Park this summer, after what seems like an age. Editors have undergone some changes in the last 12 months, but we have come out the other side a more determined band with a bunch of new songs that we think you are going to like.

"We can't wait to get back amongst it with some special festival crowds, and where could be a better place to do that than T in the Park?"

T in the Park 2013 will be headlined by Mumford & Sons, Rihanna and The Killers, with tickets on sale now.