Harry Potter Turns 20: JK Rowling Thanks Fans on First Book’s Anniversary

“It’s been wonderful,” author writes

J.K. Rowling took to her new favorite medium on Monday to mark the 20th anniversary of the publication of the first book in her beloved series about boy wizard Harry Potter.

“20 years ago today a world I had lived in alone was suddenly open to others,” the Scottish author tweeted. “It’s been wonderful. Thank you.”

“Harry Potter and the Philosopher’s Stone” — which was retitled in the U.S. as “Sorcerer’s Stone” — was first published in the U.K. on June 26, 1997.

The children’s book became a word-of-mouth phenomenon, spawning six increasingly best-selling sequels and then a blockbuster eight-film movie franchise (not counting last year’s spinoff prequel “Fantastic Beasts and Where to Find Them”).

Fans took to social media on Monday to mark the anniversary.