Strictly Come Dancing in major shake-up as British Hollywood star set to appear as guest judge for movie week

STRICTLY is getting some hex appeal — with Wicked actress Cynthia Erivo flying in to be the show’s first ­special guest mentor. The 38-year-old British star is to appear in the BBC contest’s Movie Week on October 11. A source revealed: “Strictly wanted to sprinkle some real Hollywood magic on to Movie Week and have…