Elton John and Taron Egerton team up for epic 'Rocket Man' duet

Elton John at a 2017 event

(CNN)Talk about the ultimate duet.

Elton John surprised fans at a party for his upcoming biopic, "Rocketman," while at the Cannes Film Festival on Thursday night. But it wasn't just John hitting the stage. He also brought out Taron Egerton, who plays John in the film.
And of course the duo performed his hit 1972 single "Rocket Man."