A woman leaves a shop with a window display themed on the forthcoming royal wedding between Prince Harry and Meghan Markle in Windsor, Britain, May 8, 2018.

Souvenirs themed on the forthcoming royal wedding between Prince Harry and Meghan Markle are seen for sale in Windsor, Britain, May 8, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle sit on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle are seen at the Prince William Pottery Company in Liverpool, Britain April 23, 2018. Picture taken April 23, 2018.

Souvenirs themed on the forthcoming royal wedding between Prince Harry and Meghan Markle are seen for sale in Windsor, Britain, May 8, 2018. Reuters/Toby Melville

Souvenir mugs to commemorate the wedding of Britain's Prince Harry and Meghan Markle are stacked at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018. Picture taken March 28, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle sit on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Souvenirs themed on the forthcoming royal wedding between Prince Harry and Meghan Markle are seen for sale in Windsor, Britain, May 8, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle hang on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle sit on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Mugs commemorating the wedding of Britain's Prince Harry and Meghan Markle wait to be glazed at the Emma Bridgewater Factory, in Hanley, Stoke-on-Trent, Britain March 28, 2018. Picture taken March 28, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle sit on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle sit on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Souvenirs themed on the forthcoming royal wedding between Prince Harry and Meghan Markle are seen for sale in Windsor, Britain, May 8, 2018.

A window display advertising items themed on the forthcoming royal wedding between Prince Harry and Meghan Markle is seen in Windsor, Britain, May 8, 2018.

Souvenirs featuring Britain's Prince Harry and his fiancee Meghan Markle sit on display in a shop near Windsor Castle in Windsor, Britain, April 1, 2018. Picture taken April 1, 2018.

Souvenirs themed on the forthcoming royal wedding between Prince Harry and Meghan Markle are seen for sale in Windsor, Britain, May 8, 2018.