The Chainsmokers Crashed This High School Prom

The school's principal called the surprise performance "probably the toughest secret I've ever kept."

Here’s one way to make a prom truly unforgettable.

The Chainsmokers crashed an Illinois high school’s prom on Saturday night, just before they were set to headline an arena concert.

Prom had just kicked off at Rosemont’s Hyatt Regency hotel when the electronic pop duo slipped onstage and broke into their hit single “Closer,” the Daily Herald reported.

Huntley High School Principal Scott Rowe called the surprise performance “probably the toughest secret I’ve ever kept” ― one that he credited a student with initiating.

“About two weeks ago I got this random phone call that I happened to answer, and on the other end this person said ‘This is going to be the strangest call you’ve ever received, but one of your students actually sent an email to the manager of the band,’” Rowe told the Daily Herald, speaking of the call he received from a filmographer with the group.

The band was due to perform at the Allstate Arena across the street that same night. Despite their busy schedule, they offered to entertain the students with a 10-minute set before heading to their next gig.

Social media lit up with posts and videos about the surprise performance, from both students and faculty.

For those wishing the Chainsmokers would crash their prom, the band offered some hope, tweeting: “Your prom could be next.”