Celebrities paired with professional dancers perform ballroom and Latin routines. Viewers vote for their favourite couples and these totals are combined with the ranking of the judges. The two couples with the lowest totals compete in a dance off and the judges then decide who makes it through to the next round. Tess Daly and Claudia Winkleman co-present the show. Bruce Forsyth co-presented the show from 2004 until 2013, although he continues to front specials. The judges are Len Goodman, Craig Revel Horwood, Bruno Tonioli and Darcey Bussell. Previous judges have been Arlene Phillips and Alesha Dixon. Created by Fenia Vardanis, "Strictly Come Dancing" premiered on BBC One in 2004. Companion series "It Takes Two" is shown daily on BBC Two. Len Goodman and Bruno Tonioli also judge the US version, "Dancing with the Stars".