Lawtey didn’t just walk away with a funny story either, he also gained invaluable experience working alongside Joaquin, who The Pale Blue Eye star describes as someone who delivered “a master class” every day on set. According to Harry, the Gladiator veteran actor's commitment to the role left a lasting impression on him.

Joker: Folie à Deux' actor Harry Lawtey told 'Variety' that he and Joaquin Phoenix pranked Lawtey's mother by having Phoenix appear on their FaceTime call while wearing his full Joker makeup. "I said,

Joaquin Phoenix's laugh as Arthur Fleck apparently took a toll on the actor during 'Joker: Folie à Deux' production.

In a recent interview with IGN, Phillips and screenwriter Scott Silver reflected on how Joker 2 came together. As Phillips recalls, he and Phoenix fell in love with what they created with Arthur Fleck and quickly began joking about where the character’s misadventures could continue around the 30-day mark of the first film’s 55-day shoot.

Folie à Deux, recalled the time he and Joaquin Phoenix played a trick on Lawtey’s mom on the movie set. Phoenix stayed in full Joker makeup on set, even when not filming, so Lawtey said the actor played a trick on his unsuspecting mom.