Emma Watson in Harry Potter and the Goblet of Fire, 2005.
Warner Bros.
September 19, 2015 3:39 PM EDT

Hermione Weasley, first introduced to readers of the Harry Potter series as Hermione Granger, is celebrating her 36th birthday on Saturday.

Hermione, the bookish, heroic wizard portrayed by Emma Watson in the Harry Potter films, has long been a fan favorite, and her supporters took to Twitter today to share their happy birthday notes.

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Even J.K. Rowling—Hermione’s creator who has long said the character is based on her—wished Hermione well:

More: J.K. Rowling Reveals New Harry Potter Backstory on Pottermore

Write to Mandy Oaklander at mandy.oaklander@time.com.

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