“I shared the screen with a true definition of greatness.”

Emma Watsonis paying tribute to her lateHarry PottercostarDame Maggie Smith.

Warner Bros.

Smith appeared alongside Watson in seven of the eight blockbusterHarry Potterfilms between 2000 and 2011.

Emma Watson and Maggie Smith Harry Potter

Emma Watson and Maggie Smith in ‘Harry Potter and the Goblet of Fire’.Warner Bros.

“She was real, honest, funny and self-honouring,” Watson wrote.

“Maggie, there were a lot of male professors and by God you held your own.”

The actress concluded her remarks with gratitude.

MILAN, ITALY - SEPTEMBER 21: Emma Watson attends the Prada Spring/Summer 2024 Womenswear Fashion Show on September 21, 2023 in Milan, Italy. (Photo by Vittorio Zunino Celotto/Getty Images for Prada)LONDON, ENGLAND - OCTOBER 13: Maggie Smith attends a photocall for “The Lady In The Van” during the BFI London Film Festival at May Fair Hotel on October 13, 2015 in London, England. (Photo by Mike Marsland/WireImage)

Emma Watson and Maggie Smith.Vittorio Zunino Celotto/Getty; Mike Marsland/WireImage

“Thank you for all of your kindness,” she wrote.

“I’ll miss you.”

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“Her magnificent film performances remain for all to see and enjoy.

Such an artist comes along about every other generation.

If one is lucky.”

CORRECTION: Maggie Smith appeared in only seven of the eight Harry Potter films.

This article has been updated to reflect this correction.