"It was the best [acting] of my career," Brown quipped of her performance. Elsewhere in the episode, Fallon noted that Brown had gotten married since she was last on his show. "Jake Bongiovi, I love him," the comedian said of her husband. "He's the one of the nicest, coolest dudes ever."

Millie Bobby Brown's new Netflix sci-fi movie debuts with a record-low Rotten Tomatoes score for the young actor ahead of its release on the streamer.