Madam Wu is a fictional card player and minor character from EON Productions' 2006 James Bond film Casino Royale. She was portrayed by actress Tsai Chin, who had previously played the role of Ling in the pre-title sequence of You Only Live Twice almost forty years prior.
She was first seen at Le Chiffre's ship when a Croatian General lost his money in card against Le Chiffre.
After she was one of the ten card players (including Bond, Le Chiffre and Leiter) who took part the poker match at the Casino Royale in Montenegro. It is unknown if she was a Quantum member or a friend of Le Chiffre or just an avid card player.