’s left hand is, in fact, an engagement ring – and if it is, she is far too private to announce the news with a misty-eyed Instagram dump. Besides, Dua and her fiancé boyfriend Callum Turner have been tasked with promoting a different kind of sparkle: Pharrell Williams’s second Titan collection with Tiffany & Co.

The couple last night joined a number of fashion week envoys – Paloma Elsesser, Taylor Russell, Rachel Sennott, Rosie Huntington-Whiteley, Ashley Graham and Anya Taylor-Joy – for a launch dinner at the Hôtel Plaza Athénée in Paris. They looked like the well-chiselled vampires of a True Blood remake: Dua cinched into a sculptural velvet column with wrists draped in bracelets of diamond spears, nuzzling up against Callum, a pale but better-nourished Count Orlok in broad, double-breasted tailoring.

Every generation has its vampiric beauties (Angelina Jolie and Billy Bob Thornton carrying vials of each other’s blood in the ’00s, Robert Pattinson and Kristen Stewart’s dalliance during the Twilight years) and there seems to be a renewed interest in this moribund glamour post-Nosferatu. For example: the Alexander McQueen suit that Emma D’Arcy wore to the Golden Globes drew heavily on Neil Jordan’s 1994 Interview With The Vampire, in which Brad Pitt plays an 18th-century nobleman lured into the ranks of the undead. “That hazy romanticism,” said the actor’s stylist Rose Forde of the film’s blonde wigs, ruffles and fangs. “It’s one of the most exquisite examples of fashion in cinema.”