'Joker 2' box office: Joaquin Phoenix and Lady Gaga starrer earns $7 million in US previews; eyes $50 million opening

Joker: Folie a Deux opens in the US with $7 million from previews, targeting a weekend box office of $45 million-$50 million. The follow-up to the 2019 Joker film, despite higher production costs and mixed reviews, may struggle to match the original's $1.07 billion success. Lady Gaga joins Joaquin Phoenix, adding a musical element to the sequel.