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Props, costumes and models from the popular Harry Potter movies, that chronicle the teenage wizard's adventures will be on display for the royals. Children and adults from the charities they support were also invited.
Kate sported a 60's style black and cream polka dot dress (£38 and sold out) by Topshop Tall. The dress featured short sleeves and was nipped in at the waist.
On top of her dress, the Duchess wore a wool Ralph Lauren Black Label Blazer ($1198 and no longer available).
Completing her outfit, Kate accessorized with her black, suede Episode angel pumps, the UFO black suede clutch and her Annoushka pearl and diamond drop earrings.
Before they left the royals held a meeting of their Charities Forum in the Great Hall, one of the original sets from the Potter movies. Chief executives from more than 35 charities associated with the Duke, Duchess and Prince were present at the event.
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