Mick Jagger admitted to watching DVDs of past headlining acts from Glastonbury festival in preparation of his own headlining set upon the Pyramid stage with The Rolling Stones.

According to the Guardian, Jagger, 69, said he watched footage from the past four years to get ready for what will be their first appearance at Glastonbury.

Jagger also said the band has been practicing for ‘eight or nine hours a day.’

He told the Radio Times, “Festivals are great to be at, but not always the easiest things to play,” adding, “You’ve got to really work at that bit, but I think it’s going to be a lot of fun. I’ve been working hard.”

He also said in in interview with BBC’s John Humphrys that he didn’t want to give away the setlist in advance, telling Humphrys, “It’s nice to have a bit of a surprise.” Although, he did acknowledge how hard it is to keep a setlist from leaking on the internet, given how easy it is to snap and share a picture.

While the Stones have declined to play the festival in the past, Keith Richards said about their Glastonbury debut, “I look upon it as a culmination of our British heritage really. It had to be done and it’s going to be done, and we’ll see what happens, you know.”