But Twitter users couldn't help, but notice that the Royal Albert Hall fell completely silent when the couple made their way down the steps to take their seats at the front of the auditorium.
The earrings, which feature a cluster of diamonds in the centre and a single hanging pearl, once belonged to the late Princess of Wales, who wore them several times.
Kate Middleton's dress for BAFTAs 2019 was something many had been looking forward to, and the Duchess of Cambridge certainly didn't disappoint. 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.
Kate Middleton and Prince William arrive for BAFTA 2019.
Of course William was looking as handsome as ever. While they were there, William also presented the Fellowship award to editor Thelma Schoonmaker as well. Meanwhile Kate wore a gorgeous white flowy gown made by Alexander McQueen.
The handsome jewels were the flawless finishing touch to Kate's embellished dress and took centre stage thanks to her elegant up-do.
Catherine, Duchess of Cambridge has outshone some of Hollywood's biggest stars as a special guest at the British Academy Film Awards.
During the awards ceremony, Middleton also met Olivia Colman, who took home the best actress award for her role as Queen Anne in "The Favourite", and the latter's co-star Rachel Weisz, who won best supporting actress, Daily Mail reported.