A secret act has been lined up to fill the empty slot ahead of headliners Florence + The Machine tonight, Glastonbury festival organisers revealed as the main stages opened for the first day of music.
The supporting slot had been left vacant after a last-minute schedule change which saw the band promoted to the coveted top spot when the Foo Fighters were forced to pull out last week.
Crowds gathered in front of the main stages this morning, with '90s indie-pop band The Charlatans revealed as the surprise opening act.
The 135,000 campers have enjoyed sunshine and warm weather since the gates opened on Wednesday but clouds have now gathered over the Somerset site with showers predicted later today.
Other star acts set to perform today are Mark Ronson, The Proclaimers, Rudimental and Mary J Blige before Florence + The Machine step in for a career-defining performance on the famous Pyramid stage.
Speaking in The Guardian today, singer Florence Welch made a light-hearted reference to Foo Fighter frontman Dave Grohl's leg injury and her own troubled love life.
"It's the broken hearts and broken limbs that led to Glastonbury," she said.
"It's a quite strange and quite cracked way to get there. Literally. If I'd had six months knowing that I was going to do this (headline slot), I think I would slowly have descended in to madness."
Also appearing today is singer-turned-activist Charlotte Church, fast becoming the face of the anti-austerity movement, who will welcome punk rock protesters Pussy Riot to the stage.
Glastonbury organisers have also confirmed that Azealia Banks has cancelled her performance tomorrow afternoon and has been replaced by The Strypes.
Avon and Somerset Police have so far made 37 arrests at the festival, with the majority for thefts from tents and drug offences.