"Harry Potter and the Sorcerer's Stone" was first released in 2001.
This week it crossed $1 billion at the global box office.
The film is a huge hit in China, where theaters have started to reopen.
Business Insider reports the movie earned $13.6 million on 16,000 screens in China over the weekend.
It's the second movie in the franchise to hit the milestone, joining "Harry Potter and the Deathly Hallows Part 2."
