The Girls Aloud star and classical singer have today released a cover of Queen's 1985 hit 'One Vision' as the official Team GB and Paralympics GB single.
Walsh tweeted: "Glad you all like the song! Makes you feel excited for our team doesn't it! Thanks for all your lovely tweets!"
Bandmate Nicola Roberts later tweeted: "Couldn't be prouder of our @KimberleyJWalsh .. Download #OneVision the official Team GB single now.."
The song's lyrics have been slightly adapted for their new purpose, with the phrase "one man" being changed to "one team" throughout the song.
The pair will debut the anthem tonight (May 11) at London's Royal Albert Hall, with the Duke and Duchess of Cambridge and a host of British Olympians present.
Watch Kimberley Walsh and Alfie Boe recording 'One Vision' below: