The Spice Girls have been forced to pull out of the Strictly Come Dancing semi-final after Emma Bunton sprained her ankle – but they will perform in the final next Saturday.

Baby Spice, 31, was injured after falling on stage during the Las Vegas leg of the band’s tour.

But the mother-of-one has told fans that she is ‘sure’ she will have recovered by Saturday night, the date for the first UK comeback gig.

A spokesman for the group has insisted the injury would not affect the band’s 17 UK concerts at the O2 in London.

The Spice Girls were meant to have recorded their Strictly Come Dancing performance on Friday, for broadcast on the Sunday show.

They will now perform their classic single, 2 Become 1, in the final of the BBC1 show a week later.

The group’s own professional dancers will also take to the stage while the Spice Girls perform.

This weekend’s performance would have marked a victory for Strictly Come Dancing, which has been going head-to-head on Saturday nights with Simon Cowell’s ITV contest X Factor.

But X Factor will now be finished by the time Emma, Geri Halliwell, Mel B, Mel C and Victoria Beckham appear on Strictly Come Dancing.

A BBC spokesperson said: “The Spice Girls performance on BBC1’s Strictly Come Dancing – due for transmission on Sunday December 16 – has been postponed as Emma Bunton has sprained her ankle badly and will not be able to perform.”

Celebrities Alesha Dixon, Gethin Jones and Matt Di Angelo will be competing for a place in the final on Saturday night.