Sex Pistols for Live 8
The punk legends will join a star-studded line-up at the London date of the worldwide series of charity concerts.
Band members Steve Jones, Glen Matlock and Paul Cook agreed to perform at the charity show days ago but were waiting for frontman Johnny Rotten to seal the deal.
An source revealed: "The others agreed immediately but Johnny took his time."
The turbulent band - who shot to fame with their album 'Never Mind the B******s' - split after bassist Sid Vicious died of an overdose in 1979.
Vicious joined the band in 1977 replacing bass player Matlock, who returned when the band first reunited in 1996.
Signing the Sex Pistols to Live 8 is another extraordinary coup for the organisers, who have already reeled in a galaxy of stars including The Who, Pink Floyd, Madonna, Coldplay and U2.