Take That's Gary Barlow is teaming up with music maestro Andrew Lloyd Webber to create a song for the Diamond Jubilee.
The piece will be performed at the star-studded Diamond Jubilee Concert in front of Buckingham Palace on June 4.
And in preparation, Gary will embark on an epic journey around the Commonwealth to discover what the Queen means to ordinary people.
The star's trip will feature in an hour-long documentary to be screened by BBC One.
Gary and composer Andrew will also aim to incorporate different musical traditions into the song which will feature artists and contributors from the UK and Commonwealth.
The former Take That singer'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."
Andrew 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."
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