Joker 2: Lady Gaga to play Harley Quinn in Joaquin Phoenix's film? Here's what we know
June 14, 2022 10:16 ISTDetails on Lady Gaga's character are being kept under wraps, but Joker is known for his on-off abusive relationship with Harley Quinn, his psychiatrist at the Arkham Asylum who falls in love with him and becomes his partner-in-crime.