'Joker 2' is a musical starring Joaquin Phoenix and Lady Gaga — here's everything we know
"Joker 2" being a musical isn't too far out of left ... According to Variety, the sequel picks up with Arthur in the psych ...
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Everything we know about Joker 2
Those theories were soon confirmed, as Lady Gaga was reported to be playing Harley Quinn, the Joker's love interest. In the comics, Harleen Quinzel is a psychiatrist the Joker falls in love with ...