Kate Middleton and Queen Elizabeth visited the Royal Wedding exhibit at Buckingham Palace today, and the Queen took the opportunity to show her granddaughter-in-law she’s got a wicked sense of humor.

Approaching Middleton’s wedding gown, designed by Sarah Burton for Alexander McQueen, her royal highness cracked, “Horrid, isn’t it? Horrid and dreadful!”

The new exhibition dedicated to Prince William and Kate’s April nuptials also features the Duchess’ wedding jewelry (including the dazzling Cartier tiara Elizabeth loaned Kate for the big day), as well as their extravagant wedding cake.

As the two were touring the palace to view the rest of the exhibit, the Queen joked, “You’ve seen this already, so… you don’t really want to see it again, do you?”

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