Fans already knew Millie Bobby Brown could act, but did they know she could also sing?
The Stranger Things star appeared on Wednesday's episode of The Tonight Show and totally killed it in a "beat battle" against Jimmy Fallon.
Face-off - Actress - Host - Turns - Songs
For the face-off, the actress and the late-night host took turns singing songs that went along with a random beat played by the show's band The Roots. If a player couldn't think of a new song or hesitated, he or she lost.