Gillian Chung
The Twins Effect, also known as Vampire Effect in the United States, is a 2003 Hong Kong martial arts comedy-horror film directed by Dante Lam and Donnie Yen. The film was derived from Cantopop group Twins, starring both members Charlene Choi and Gillian Chung in the leading roles. Co-stars include Edison Chen and Ekin Cheng. Jackie Chan makes a cameo appearance as an ambulance driver.