Gary Barlow is to sing on a revamped version of the hugely successful The War of the Worlds musical album.
The Take That star and X Factor judge is performing two of the hit production's most famous songs.
He is singing Forever Autumn and The Eve of the War, which includes the famous line: "The chances of anything coming from Mars are a million to one - but still they come."
They were originally sung by Moody Blues singer Justin Hayward.
Other new voices appearing on the recording include soul singer Joss Stone, singer and rapper Maverick Sabre, singer-songwriter Alex Clare and Kaiser Chiefs frontman Ricky Wilson, who is also appearing in the stage version.
The long-running musical, based on HG Wells' story about an alien invasion of Victorian England, was first recorded by composer Jeff Wayne in 1978 and spent more than 330 weeks in the charts.
It reached number one in 11 countries and sold more than 15 million copies.
Barlow said: "I've been a huge fan of The War of The Worlds score since I was a kid, so to be asked to work with the legend that is Jeff Wayne was a real privilege."
He will play the role of The Sung Thoughts of The Journalist.
Actor Liam Neeson is playing The Journalist - the narrator role originally taken by Richard Burton. A hologram of Burton's head had appeared in the show since 2006.
In a new element of the stage production, Neeson's 3D holographic character will appear to interact with the live performers on stage.
"I knew and loved the book from when I was a teenager and it was an easy persuasion," Neeson said. "And I bought the album in 1979 when I was working in Ireland. I still have that little cassette."
The album will be released in November, digitally and on double vinyl. The UK stage tour begins in December.
Gary Barlow will also appear with Andrew Lloyd Webber and The Military Wives Choir, conducted by Gareth Malone, at the Classic Brits on 2 October. They will perform their UK number one single Sing, with Barlow and Lord Lloyd-Webber taking centre stage on two grand pianos.