Metallica, Prince and Outkast have reportedly been booked to perform at this year's Glastonbury Festival, according to a music industry insider.
So far, only Arcade Fire have been officially announced to headline this year's Worthy Farm event, but a source, who is no stranger to Glastonbury, has told Gigwise that they believe that further big-name bands have already been booked.
"I was hearing that Metallica will be headlining Glastonbury - I don't know when it gets released, but I heard that today," says the insider, who asked not to be named. They also revealed Prince will be topping the bill at Worthy Farm - and freshly reunited hip hop duo Outkast will open for The Purple One.
"Prince and Outkast are going to be playing Glastonbury, with Outkast apparently playing underneath Prince," the source said.
Update: A spokesperson for the star has since confirmed to Gigwise that Prince has not been booked for Glastonbury 2014.
Watch the video for Prince's 'Kiss' below:
The rumours are yet to be confirmed by Glastonbury organisers, but with Prince making more and more frequent live appearances with his 3RDEYEGIRL band, and Outkast having just confirmed they will be performing at a whopping 40 festivals in 2014.
Below: potential Glastonbury headliners - the for and the against