The Duchess of Sussex's wedding dress, described by aficionados as among the most elegant and minimal bridal designs in the history of royal weddings, is to go on public display.
Ahead of the show, the Duke and Duchess met with Lin-Manuel Miranda, as well as the cast.
For the occasion, Meghan looked fantastic in a black Judith and Charles tuxedo mini dress.
Pre-Harry, Meghan was a big fan of the short suit, wearing it on red carpets and for chatshow appearances.
The late Princess of Wales wore a strikingly similar tuxedo mini dress to her own charity event back in 1996.
It hit the stage in London in December 2017, after a hugely successful run in America.
Harry and Meghan first saw "Hamilton" in London in February.
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A copy of Prince Harry's Blues and Royals frock coat made by Dege & Skinner, as well as the blue and black wool pants will also be included in the exhibition.
Rachel John, an Olivier nominated actress who plays Angelica Schuyler in the musical, was especially stunned and dropped her jaw in amazement at the unexpected performance.