Olympic medal winners Louis Smith and Victoria Pendleton will take to the dance floor for the new series of BBC One's Strictly Come Dancing.
The sports stars will join Girls Aloud singer Kimberley Walsh, Tracy Beaker actress Dani Harmer and Westlife's Nicky Byrne.
The remaining eight celebrity contestants are soon to be revealed.
The celebrities' dance partners will be announced when the show kicks off on Saturday night.
British cyclist Pendleton, who won one gold and one silver medal at London 2012, has now retired from the sport.
The 31-year-old's agent said: "No doubt she'll work at it to become a very good dancer. That's what athletes do."
Gymnast Louis Smith won a silver medal in the pommel horse event.
The 23-year-old is no stranger to reality TV, having already made an appearance on The X Factor in 2008.
Harmer, best known for playing Tracy Beaker on CBBC, was the first celebrity to be unveiled ahead of the latest Strictly series.
Kimberley Walsh was confirmed over the weekend and has tweeted a photo of herself practising with dancer Anton du Beke.
She told fans that rehearsals had been "so much fun" but said she would not reveal who her partner will be.
At the age of 74, former children's TV host Johnny Ball is expected to be the oldest competitor in this year's show.
Other contestants believed to be involved include Eastenders actor Sid Owen, model Jerry Hall, actor Colin Salmon and TV presenter Fern Britton.