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.
Lots of royal fans paid particular attention to what were on her ears; pearl and diamond drop earrings that once belonged to her late mother-in-law.
Prince William wore a traditional black tuxedo but strayed from tradition slightly with a pair of black velvet loafers.
In London died down, one of the momentous social events - the prestigious ceremony of awarding the best actors and Directors the BAFTA-2019.
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Princess Diana wore the earrings to a concert at the Royal Albert Hall in 1991.
Catherine, Duchess of Cambridge, Prince William, Duke of Cambridge and Amanda Barrie attend the EE British Academy Film Awards at Royal Albert Hall on February 10, 2019 in London, England. Last month, Meghan wore one of her bracelets to an event while Kate wore her sapphire earrings to a different engagement.
Kate Middleton has several pieces of jewellery from Princes Diana's collection, which she uses every now and then.
The couple also met with various winners after the ceremony, including Olivia Colman, Letitia Wright, Spike Lee and Rachel Weisz.
The award is the highest accolade bestowed by the Academy to an individual in recognition of an outstanding and exceptional contribution to film, television or games.