Take That's Gary Barlow is teaming up with musical maestro Andrew Lloyd Webber to create a song for the Diamond Jubilee celebrations.
And the pair are aiming to Rule The World by scouring locations around the globe to find other artists to perform with them. The song will be performed at the star-studded Diamond Jubilee Concert in front of Buckingham Palace on June 4.
In preparation, Barlow will embark on an epic journey around the Commonwealth to discover what the Queen means to people. His trip will feature in an hour-long documentary on BBC One.
Barlow and Lloyd Webber will also aim to incorporate different musical traditions into the song which will feature artists and contributors from the UK and Commonwealth. They could include international names and unknowns from remote villages.
Barlow's journey will see him travel to the Caribbean, Africa, the Pacific Islands and Australasia.
He said: "This is probably the biggest challenge I've ever taken on musically. I'm so excited and thrilled to be a part of it."
Lloyd Webber said: "It is a huge honour to be involved in this historic occasion and I am looking forward very much to working with Gary."
The song-writing project was announced on Radio 2's Chris Evans show this morning.
Barlow is helping to organise the concert, which will feature performances by Sir Paul McCartney and Sir Elton John. Others due to take part are Dame Shirley Bassey, Jessie J, Ed Sheeran and Sir Cliff Richard.
The star, who said he is hoping for a baby daughter when his wife gives birth on August 31, said he expected the Queen to take to the stage at the end of the Jubilee concert. "Obviously, she comes on at the end and meets everybody. She'll say a few words," he said.