During a press conference at the Venice Film Festival for their upcoming film 'Joker: Folie à Deux', Joaquin Phoenix praised Lady Gaga for her significant weight loss while preparing for her role as Harley Quinn, stating, 'It was really impressive.' Phoenix, who has previously undergone extreme weight loss for his portrayal of Arthur Fleck, mentioned that his own experience this time was more complicated due to extensive dance rehearsals. He expressed uncertainty about taking on roles that require weight loss in the future, admitting, 'I probably shouldn’t do this again.' Gaga acknowledged their transformation into their characters over time, emphasizing the detail-oriented work they did. Both actors discussed the physical toll of their diets, with Phoenix opting not to share specifics for fear of promoting obsession with weight. The film follows the characters' chaotic journey and is set to premiere soon.