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, no doubt a method actor, got into character once more on the set of Joker: Folie à Deux; some of his character’s antics even transitioned into real-life scenarios. Harry Lawtey, in a recent interview with Variety,

Folie à Deux” co-star Harry Lawtey told Variety that the Oscar winner couldn’t stop coughing after doing Arthur’s maniacal chuckle. “To watch him do that laugh and to see the effect on him — on everyone — blew my mind,

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.