It's the first major Hollywood studio to work with the social networking giant in this way. Executives hope it will be a new way for the entertainment company to make money. The service will only be available to Facebook users in America to start with. But if it proves successful it could roll out to other countries around the world including the UK.
It works by charging people 30 Facebook credits, the equivalent of 3 dollars (1.85 pounds), to rent the film. They then have 48 hours in which to watch it.
The first movie being made available is 2008 blockbuster 'Batman: The Dark Knight'. Other films will follow over the next few months although there are no details yet on which ones.
"Facebook has become a daily destination for hundreds of millions of people," the BBC quoted Warner Bros statement as saying. "Making our films available through Facebook is a natural extension of our digital distribution efforts," it continued.
"It gives consumers a simple, convenient way to access and enjoy our films through the world's largest social network," it added.