A film producer oversees and delivers a film project to all relevant presenter hosts while preserving the integrity, voice and vision of the film. They will also often take on some financial risk by using their own money, especially during the pre-production period, before a film is fully financed. Many film producers are also talent (directors, screenwriters, actors) but that is not always the case.
The producer is often actively involved throughout all major phases of the film making process, from inception and development to completion and delivery of a film producer. However, an idea or concept for a film can originate with any individual, including a screenwriter, a director or a producer.