Todd Phillips and Joaquin Phoenix talk 'Joker: Folie a Deux' and working with Lady Gaga

Lady Gaga stuns in a custom-made gown as she joins co-star Joaquin Phoenix and supportive fiancé Michael Polansky at the UK premiere of Joker: Folie à Deux - after its triumphant opening in Venice

Joaquin Phoenix Was ‘Sick’ With Nerves Over Singing With Lady Gaga, ‘Joker 2’ Director Reveals

Christine Vachon Calls Joaquin Phoenix’s Exit from Todd Haynes Project a ‘Tragedy’: ‘It Sends a Shockwave Through the Industry’