Mark Owen has been signed up by bandmate Robbie Williams as the latest big name for Soccer Aid.
The Take That star joins a line-up for the charity event that includes Hollywood actors Jason Isaacs, Gerard Butler, Will Ferrell and Mike Myers.
The celebrities will do battle at Old Trafford on May 27.
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Canada's Prime Minister sent a video challenge to Kensington Palace and the White House in the build up to next month's Invictus Games.
Karl, 17, was stabbed to death when his friends became involved in a row with around a gang of youths in Hackney, east London in 2004.
Researchers believe they have found the wreckage of British explorer James Cook's ship "Endeavour".