Rock group Led Zeppelin have been forced to postpone their reunion concert after guitarist Jimmy Page fractured a finger.
Page received the injury at the weekend and has been told he cannot play for three weeks.
The Ahmet Ertegun Tribute Concert will now take place at The O2 Arena, London, on Monday December 10, rather than Monday November 26 as originally planned.
In a statement on the band's website, Page said: "I am disappointed that we are forced to postpone the concert by two weeks.
"However, Led Zeppelin have always set very high standards for ourselves and we feel that this postponement will enable my injury to properly heal, and permit us to perform at the level that both the band and our fans have always been accustomed to."
An unnamed specialist treating Page said: "I have examined the fracture to Mr Page's finger, and it is my opinion that with proper rest and treatment, he will be ready to resume rehearsing in three weeks time, and thus able to perform on December 10."
The rockers announced the one-off comeback gig - their first for 19 years - in September as a tribute to the late founder of Atlantic Records, Ahmet Ertegun, who signed the band in 1968.
The group's three original members, singer Robert Plant, guitarist Jimmy Page and bassist John Paul Jones, will headline the concert at The O2 arena with late drummer John Bonham's son, Jason, on drums.
The Who's Pete Townshend, Bill Wyman and the Rhythm Kings, rock band Foreigner and Scottish 20-year-old star Paolo Nutini, are also expected to play.
More than 20 million fans rushed to register for tickets, which were allocated by lottery.
Tickets for the November gig will still be valid for the rescheduled concert.
Profits from the show will go to the Ahmet Ertegun Education Fund, which pays for student scholarships to universities in the UK, US and Turkey.
It will also be used to establish a music scholarship at Ravensbourne College in Kent.
Led Zeppelin split when Bonham died in 1980 after a drinking binge.
Since then, they have performed only a handful of gigs, including Live Aid in 1985 and an Atlantic Records anniversary gig three years later.