The game is only a month away from release, but Square-Enix has just let loose another rather significant piece of news for their forthcoming open-world action title Sleeping Dogs -- the game's cast of voice actors.

Peppered with familiar faces, a new behind the scenes trailer features commentary from the likes of Edison Chen, Emma Stone, Tom Wilkinson and Lucy Liu, as well as even more veterans from Asian cinema.

Sleeping Dogs features the voice talent of Will Yun Lee (Die Another Day, Total Recall) as Wei Shen, an officer sent deep undercover into one of Hong Kong’s most feared Triad gangs, the Sun On Yee. With the aid of Police Inspector Pendrew, played by Tom Wilkinson (Batman Begins, The Full Monty), Wei must earn the trust of his childhood friend, Jackie Mah, voiced by Edison Chen (Infernal Affairs I/II, The Dark Knight). Through Jackie, now a low-level thug running for the Sun On Yee, Wei will become one of the most-trusted lieutenants of Red Pole Winston Chu, played by Parry Shen (Better Luck Tomorrow, The New Guy), slowly becoming ingrained in the criminal underworld and becoming one of the very men he was sent to bring down.

With a supporting cast including Emma Stone (The Amazing Spider-Man, Zombieland), Robin Shou (Hard to Kill, Fatal Chase), Terence Yin (New Police Story, Colour of the Truth), James Hong (Blade Runner, The Day the Earth Stood Still), Lucy Liu (Kill Bill: Vol. 1, The Man with the Iron Fists), Tzi-Ma (Rush Hour, The Quiet American), Yunjin Kim (Lost, Diary of June) and Kelly Hu (Martial Law, X2), Sleeping Dogs features one of the most credible casts of Asian and Western cinema stars, bringing the game’s deep and evolving plot to life.

Sleeping Dogs is due on August 16th 2012 for PC, Xbox 360 and PlayStation 3.

Watch the voice cast video below, or click here for the HD video page.