This movie is based on the Hong Kong blockbuster Infernal Affairs. The director is Martin Scorscese, and it stars Leonardo DiCaprio, Matt Damon, Jack Nicholson, Mark Wahlberg, Martin Sheen, and Alec Baldwin.
I'm really looking forward to this movie. I mean it's got an all-star cast, it has been getting rave reviews, and Martin definitely knows his gangster flicks!