Today marks exactly 100 days to go until the opening of the Paralympic Games.

As part of the celebrations to mark the milestone the London Organising Committee of the Olympic and Paralympic Games (LOCOG) announced that Coldplay will perform at the closing ceremony for the Games, which will also mark the end of London 2012.

A projection of a giant Agitos on the White Cliffs of Dover has also marked the start of the 100-day countdown, and more than 1million remaining tickets for the Paralympic Games, starting on August 29, will go on sale this morning at 11am, with tickets to events including the opening and closing ceremonies, as well as to all sports including athletics, available to fans.

Coldplay’s Chris Martin said: “Being asked to play at the closing celebrations for the Paralympic athletes in London is such a great honour for us.

“It will be one of the biggest nights of our lives and we’re very excited to try to create a performance for the last night of the games that will close London 2012 in style.”

Seb Coe, chairman of LOCOG, said: “The London 2012 Paralympic Games are going to be spectacular. I am delighted that Coldplay are going to be helping us celebrate not only the end of a fantastic Paralympic Games, but also the end of a seven year journey.”

The closing ceremony of the Paralympic Games on September 9 is called Festival of Flame, and will include a celebration of Britain’s culture of festivals, from the ancient to the modern day.

Sir Philip Craven, president of the International Paralympic Committee (IPC) said: “With 4,200 athletes from 165 countries set to compete in the British capital in 100 days time, the London Paralympic Games will officially be the biggest ever.

“I’m also becoming increasingly confident that they may also be the best ever, even surpassing Beijing which I didn’t think was possible four years ago.

“Athletes are delivering record breaking performances on an astoundingly frequent basis, ticket sales are the best yet so far out from a Games and a record number of TV viewers are set to watch the Paralympics around the world.

“To add into that mix Coldplay for the closing ceremony and I think the ingredients for the best ever Games are starting to come together.”