Molly Bloom told Aaron Sorkin that she wanted Jessica Chastain to play her. Bloom is a year younger than Chastain in real life.
According to Molly Bloom, the most money she'd ever seen lost in a card game session in one night was $100 million. The losing player settled the debt the following day.
Because of schedules, Idris Elba and Jessica Chastain had only 10 days to shoot. They shot 45 pages in the first 6 days. They rehearsed off-set before shooting began, and between takes.
All of the extras in the card games are professional poker players. First-time director Aaron Sorkin wanted realism, right down to the way players handled cards during games.