Colleen Atwood has won her fourth Oscar for best costume design for her work on Fantastic Beasts and Where to Find Them — which is the first-ever Academy Award for a film in the Harry Potter franchise.

“Sting told me I was going to win tonight. I didn’t believe him,” Atwood joked during her acceptance speech at Sunday’s Academy Awards.

Backstage, she was asked about being the first person to ever win an Oscar for a Harry Potter film.

“I didn’t realize that. That’s shocking,” Atwood said. “Because there’s so much incredible kind of artistry in the Harry Potter movies. I think maybe the fact that this movie, J.K. Rowling’s creation is set in the 1920s, which kind of keyed off a different sort of visual sense, might be the kind of obvious thing, but I can’t believe they never won for that incredible clockwork creation of Stuart Craig in the Harry Potter movies. I wasn’t aware of that.”

Atwood previously won in the category for Chicago, Memoirs of a Geisha, and Alice in Wonderland; this year’s nomination marks her 12th.

Directed by David Yates and written by J.K. Rowling, the Harry Potter prequel is set in 1926 New York and follows magizoologist Newt Scamander (Eddie Redmayne), ex-auror Tina (Katherine Waterston), her sister Queenie (Alison Sudol), and No-Maj Jacob Kowalski (Dan Fogler) after Newt’s magical creatures escape. The film is also nominated for best production design.

“I based the costumes heavily on a lot of period research and then within the world of magic and magical people I used the period, but I did little tweaks to it,” Atwood previously told EW of her work on the fantasy flick, which also received BAFTA Awards and CDG Awards costume nods, among other awards season attention. “I took liberty with the period in using sort of lighter fabrics and fabrics with a little more movement on the magical world to kind of separate those people from the regular folks on the street.”

Also up for the award were Joanna Johnston for Allied, Consolata Boyle for Florence Foster Jenkins, Madeline Fontaine for Jackie, and Mary Zophres for La La Land. (With 14 total nominations, La La Land was expected to maybe win in this category.)

For more, read how this year’s Best Costume Design winner and nominees took their designs from sketch to screen here and here.

Reporting by Marc Snetiker