'Countdown' star Rachel Riley is swapping letters and numbers for waltzes and rumbas after officially signing up for 'Strictly Come Dancing'.
The presenter, who recently racked up a milestone 1,000 appearances on the Channel 4 show, will join Vanessa Feltz, 'BBC Breakfast' presenter Susanna Reid and golfer Tony Jacklin, who have also confirmed they are appearing on the BBC ballroom show.
Countdown's Rachel Riley
The maths whizz, who studied at Oxford, married Jamie Gilbert last year with guests including Countdown host Nick Hewer.
Other names rumoured to be in talks to battle it out for Strictly's glitterball trophy include rugby player Ben Cohen, designer Julien Macdonald, singer Sophie Ellis-Bextor, model Abbey Clancy and 'Hairy Bikers' cook Dave Myers.
'Strictly Come Dancing' begins its 11th series next Saturday on BBC One.
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