Princes William and Harry admit they themselves are wracked with nerves ahead of the tribute concert to their mother Princess Diana tomorrow.
A host of big-name musicians including Rod Stewart, Lily Allen and Kanye West are due to perform at the Concert for Diana at Wembley Stadium on Sunday.
But the princes say the prospect of getting up on stage in front of 65,000 fans will likely reduce them to "gibbering wrecks" by the end of the concert; held to mark ten years since their mother died in a car crash in Paris.
"We'll definitely be up at some point giving some sort of speech," Prince William said.
"It wasn't something we were contemplating and now we're like 'OK 65,000 people at Wembley and God knows how many people will be watching it on television'."
Sir Elton John is also set to sing at Wembley tomorrow, with Prince Harry confirming that they had asked the 60-year-old singer to perform his tribute song to Princess Diana Candle in the Wind.
The 60-year-old singer last played the song at the Princess of Wales' funeral in 1997, vowing never to perform it again.
"He's helped massively just by saying yes, and obviously a personal request from us is to do Candle in the Wind again. So hopefully he'll be playing that," Prince Harry told the BBC.
On the concert itself the third in line to the throne added: "If it goes wrong it will be very nerve-racking but there's a lot to look forward to.
"It's easy to say we're nervous beforehand but at the end of the day I hope it's going to be a really amazing evening."
Other acts performing tomorrow include Duran Duran, the Feeling, Joss Stone, Nelly Furtado and Take That, with the newly-reformed Spice Girls expected to make a surprise appearance.