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Stella McCartney attended King Charles III’s coronation concert on Sunday in Windsor, England. The dressmaker performed an original spoken-word piece about certainly one of the monarch’s favorite causes: conservation.

On the red carpet, McCartney sported an oversize plaid blazer from her own line. It debuted on the runway during London Fashion Week as a part of McCartney’s fall 2023 collection.

She wore the jacket, which features exaggerated shoulders, over faux leather leggings. The designer accessorized with a pair of black heeled booties.

Onstage, McCartney become a shiny red version of the double-breasted blazer, which she styled over a black sheer polka-dot tights.

McCartney is the daughter of Sir Paul McCartney and Linda McCartney, and is understood for not using leather, feathers, skin or fur in her collections. Her brand has been around since 2001.

McCartney and King Charles have worked together on environmental projects previously, and he or she was rewarded with a Commander of the Order of the British Empire honor.

The coronation concert, broadcast live at Windsor Castle by the BBC and BBC Studios, followed the coronation of King Charles III and Queen Camilla. The list of performers included Katy Perry, Lionel Richie, Andrea Bocelli, Sir Bryn Terfel, Take That, Freya Ridings and Alexis Ffrench. The show also featured a performance by the Coronation Choir, a gaggle that recruited members from choirs across the U.K., including refugee choirs, NHS choirs, LGBTQ choirs and deaf signing choirs.