Schnapp, who plays Will (the kid the Demogorgon abducted) in Stranger Things, is a huge Panic! At The Disco fan! He starred in Panic!’s music video for “LA Devotee,” and hinted at his performance back in September when the video was first released.
Schnapp joined Panic! just before they were about to perform “LA Devotee” and the whole crowd lost it! Watch below: