Kate and William made quite the entrance when they arrived at the awards 'do, too, with the red carpet in shut-down mode as they walked through in front of the cameras.
The Duchess went for an nearly bridal look, donning a sweeping, one-shoulder white gown by her favourite designer Alexander McQueen. The adorable moment saw Kate whisked off by BAFTA Chief Executive Amanda Berry, quietly saying her apologies to those nearby as she climbed the steps through the audience. In June 1997, Diana wore the earrings without the drop to a performance of Swan Lake at Royal Albert Hall, one of her last public appearances before her death in August.
During the ceremony, William - who is the the president of the British Academy Film Awards - presented the Fellowship award to film editor Thelma Schoonmaker.
Kate Middleton has several pieces of jewellery from Princes Diana's collection, which she uses every now and then.
She accessorised the stunning gown with glittering silver stilettos and striking pearl and diamanté earrings and a bracelet, believed to have belonged to her late mother-in-law Princess Diana.
The Favourite, the 18th-century royal drama, kicked off the Awards by winning the prize for best British film. Actress Olivia Colman, who played the role of Queen Anne in The Favourite, won Best Actress while her co-star Rachel Weisz won Best Supporting Actress.