Tess Daly and Claudia Winkleman host the live grand final, which sees the final four celebrity contestants and their partners taking to the stage for three dances that will determine whether they claim the glitterball trophy. Shirley Ballas, Bruno Tonioli, Craig Revel Horwood and Darcey Bussell offer their comments and score the performances, but as always, their opinions are merely guidance - the decision as to who waltzes off with this year's title is down to the viewers' vote. As the winner is decided, the rest of the 2017 cast are expected to return for one final, celebratory group performance. Plus, Ed Sheeran steps up to the stage for a special performance.