Prince Robert incidentally has a sister, Princess Gwen (Tallulah Greive), who has 80s Sloane Lady Di-era short hair and an enthusiasm for reformist government. I wonder if the film-makers were thinking about giving us a boldly inclusive romantic plot twist for Princess Gwen – did they maybe lose their nerve? Some movies really make it hard for themselves. Cinderella’s producer-star James Corden staged an intensely annoying traffic-stopping flashmob publicity stunt for which prison sentences for all concerned would not be too harsh. It certainly pre-fluffed the snark glands of social media, with much overexcitement at the thought of a new Cats debacle . But no. Actually, writer-director Kay Cannon’s new Cinderella isn’t bad, and Camila Cabello makes a rather personable lead, carrying off some of the movie’s generous helping of funny lines. Doesn’t she want to go to the ball, testily inquires genderqueer fairy godparent Fab G, played by Billy Porter. “Yes, I was just crying and singing about it,” says Cinderella thoughtfully.