A pair of pearl drop Erdem earrings was all that was needed to finish the look.
Proving she's a thrifty member of the Kensington Palace household, she first donned the jewels to open the Photography Centre at the Victoria and Albert Museum back in October 2018.
Though it's not surprising that the 37-year-old was crowned best-dressed at her most recent engagement, as she has attended the annual event twice previously.
For her Royal Variety debut in 2014, Kate chose a black Diane Von Furstenberg lace gown. In a surprise move, she eschewed her signature blow dry in favour of a regal updo.
For her second appearance three years later, the royal proved that the annual event is the perfect chance to showcase homegrown talent in Jenny Packham sequins.
Last year, the Duke and Duchess of Sussex took the place of the Cambridges on the famous evening.
For her first appearance at the ceremony, Meghan Markle dressed her bump in an embroidered Safiyaa top and black floor-sweeping skirt.
At this year's prestigious ceremony, the Duke and Duchess of Cambridge met performers including the cast of Mary Poppins.
The annual gathering is in aid of the Royal Variety Charity which supports past and present entertainers across the UK who are in need of support.
It is believed to be the only organisation in the nation with an unbroken line of patronage from the reigning monarch with the Queen currently at the helm.