The Best Actress winner, 60, headed to the annual Governors Ball party after the show, where she had her statue engraved with her name. But she soon realized that her gold statue was missing.
McDormand left the party with her husband, Joel Coen, but security was eventually able to find the prize and return it to the actress.
“I can confirm that after a brief time apart, Frances and her Oscar were happily reunited last night. They celebrated their reunion with a double cheeseburger from In-N-Out,” McDormand’s rep tells PEOPLE.
A man was later arrested for allegedly stealing the Oscar, the Los Angeles Police Department tells PEOPLE.
“Best Actress winner Frances McDormand and her Oscar were happily reunited after a brief separation at last night’s Governors Ball,” a spokesperson for the Academy tells PEOPLE. “The alleged thief was quickly apprehended by a photographer and members of our fast-acting Academy and security teams. The “Three Billboards Outside Ebbing, Missouri” star resumed her celebrations.”
Chef Wolfgang Puck’s photographer captured a photo of the suspect before retrieving the allegedly stolen Oscar, Buckley tweeted. Security personnel continued to search for the alleged Oscar thief, Buckley tweeted, but he had apparently gone back into the party after the confrontation.
“Apparently Frances has said to let him go,” Buckley tweeted.
Neither McDormand’s rep nor Three Billboards Outside Ebbing, Missouri distributor Fox Searchlight Pictures immediately responded to PEOPLE’s request for comment.
The Three Billboards Outside Ebbing, Missouri star was the frontrunner leading up to the Academy Awards as she swept the major awards shows in the months before. The veteran actress picked up the Golden Globe, Screen Actors Guild and BAFTA awards on her way to claim the big prize.
WATCH: Frances McDormand Wins Oscar for Best Actress in a Leading Role
“So I’m hyperventilating a little bit so if I fall over pick me up cause I got some things to say,” McDormand joked at the beginning of her acceptance speech. “I think this is what [Olympian Chloe Kim] must have felt like after she did back to back 1080s.”
After inviting every female nominee in the audience across all categories to stand, she continued, “We all have stories to tell. Invite us into your offices and we’ll tell you all about them.”
Host Jimmy Kimmel joked after, “I hope she wins an Emmy for that speech because that was unbelievable.”
The 2018 Oscars were held at the Dolby Theatre at Hollywood & Highland Center on March 4 and were telecast live on ABC.