The Twins Effect
| The Twins Effect | |
|---|---|
Film poster  | |
| Traditional Chinese | 千機變 | 
| Simplified Chinese | 千机变 | 
| Hanyu Pinyin | Qiān Jī Biàn | 
| Jyutping | Cin1 Gei1 Bin3 | 
| Directed by | Dante Lam Donnie Yen  | 
| Written by | Chan Hing-kar Jack Ng  | 
| Produced by | Cheung Shing-sheung | 
| Starring | Charlene Choi Gillian Chung Ekin Cheng Edison Chen Anthony Wong Mandy Chiang Josie Ho Maggie Lau Jackie Chan Karen Mok Chapman To  | 
| Cinematography | Cheung Man-po | 
| Edited by | Chan Kei-hop | 
| Music by | Chan Kwong-wing | 
Production companies  | Emperor Multimedia Group Goldpeak Corporation Limited  | 
| Distributed by | Columbia Tristar Home Entertainment | 
Release date  | 
  | 
Running time  | 107 minutes | 
| Country | Hong Kong | 
| Language | Cantonese | 
| Box office | $28,423,960 (Hong Kong) | 
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.
Released on 8 March 2003, The Twins Effect was a box-office success in Hong Kong, becoming the highest-grossing domestic film of the year. The film gained huge popularity, mainly from fans of the Cantopop group Twins.