Roles in filming

Producer

J.J Abrams - Producer
Star Wars

This person is essentially the group leader and is responsible for managing the production from start to finish. The producer develops the project from the initial idea, makes sure the script is finalized, arranges the financing and manages the production team that makes the film.
The producer also coordinates the filmmaking process to ensure that everyone involved in the project is working on schedule and on budget. Without the producer at the helm, films do not get made.

George Lucas - Director
Star Wars 

Director

The director is primarily responsible for overseeing the shooting and assembly of a film. While the director might be compared to a novel's author as a film's primary visionary, he or she would not be able to make the film without the help of numerous other artists and technicians.
In fact, the notion of the director as an author is misleading because it assumes the director, like an author, does everything. A director works at the center of film production, but is inextricably linked with dozens of other people who get the job done together.

Carrie Fisher - Screenwriter
Postcards from the Edge
Also a Star Wars actor

Screenwriter

While the dialogue in a film may seem natural to the viewer, a writer carefully crafts it; however, the screenwriter does far more than provide dialogue for the actors. He or she also shapes the sequence of events in a film to ensure that one scene transitions to the next so that the story will unfold logically and in an interesting way.
Like the producer, the screenwriter's role is generally overlooked by the movie-going public, yet is essential to the completion of any film. If there is no script, there is no movie.

William Cameron Menzies-
Came up with production design

Production Designer

Before one inch of film is shot, the production designer is the first artist to translate the script into visual form. He or she creates a series of storyboards that serve as the film's first draft.
A storyboard is a series of sketches on panels that shows the visual progression of the story from one scene to the next. Creating this sketch of the film on storyboards also ensures the visual continuity of the film from start to finish. Storyboards serve as the director's visual guide throughout the production and will be a template to follow during the editing process.

Stuart Craig - Art Director
Harry Potter

Art Director

The art director is responsible for the film's settings: the buildings, landscapes and interiors that provide the physical context for the characters. This person is responsible for acquiring props, decorating sets and making the setting believable.

Kath Janie Bryant - Costume designer
Mad men and Deadwood

Costume Designer

Costumes convey a great deal about the film's time period and the characters who wear them, including their economic status, occupation and attitude toward themselves. Be sure to think about how costuming can show something about the character visuality.

Wally Pfister - Cinematographer
Batman, Inception & Italian Job

Cinematographer

The director of photography, or DP, is responsible for capturing the script on film or video. The DP must pay attention to lighting and the camera's technical capabilities.
When the director wants a shot to achieve certain visual or atmospheric qualities, the DP achieves it through his or her choice of lighting, film stock and careful manipulation of the camera. This craft is referred to as cinematography.

Mary Jo Markey - Editor
Star Wars
Mission Impossible

Editor

Shortly after shooting begins, the editor begins to organize the footage and arranges individual shots into one continuous sequence. Even in a single scene, dozens of different shots have to be chosen and assembled from hundreds of feet of film. The editor's choices about which shots to use, and the order in which to place them, have a profound effect on the appearance of the
final film.

Liam Neeson - Actor
Star Wars, Schindlers list & Taken

Actors

Responsible for portraying the characters in a film, actors work closely with the director and cinematographer. Considering an actor's role within this larger context also suggests that his or her job is much more difficult than just appearing on the set and reciting lines.

Music Supervisor/Composer

John Williams - Composer
Star Wars, Indiana Jones & Jaws

Emma Watson - Actor
Harry Potter & This is the end

Music has been an integral part of movies since cinema's earliest days in the 1890s. A piano or organ player accompanied even the simplest silent films. The silent movie palaces of the 1920s were equipped with elaborate organs and orchestra pits to accommodate large groups of live musicians. Today selecting just the right music for the film will intensify the story for the audience.