'Rhian Denise Ramos' was originally tapped in the movie. A conflict in the schedule forced her to drop this movie. She was replaced by Sandara Park.
In the scene at the convenience store, the voices of the hold-up gang were dubbed by three Filipino directors, Manny Valera, Joel Lamangan and the film's director Quark Henares.
One of the gang in the hold-up scene is played by Sid Lucero, son of Mark Gil. The girl he holds at gunpoint is played by his real-life girlfriend (and wardrobe girl) Rozie Delgado.
Jennylyn Mercado took arnis training from Jon Escudero and martial arts from Phillip Ko to prepare for her role.
Director Quark Henares encouraged Jennylyn Mercado to play the role of Lia by showing her clips of Charlize Theron from the movie Æon Flux (2005).