The opening credits for feature films often go in a traditional format which follows a specific order.
A Real Movie
For minimal titles - you must have at least the below in this order
Distributor Production Company A film by... (directors name) TITLE Starring (some names) Casting By Music By Production Designer... Edited By... Director of Photography... Written and Directed by...
You may have noticed that in the majority of professional films you watched growing contained a very basic way of showing credits. This would be white letters with a standard font, scrolling down on a black screen. Although today the opening credits in professional films have taken more of a creative approach, the order of the credits have stayed the same throughout history.
Opening
In a traditional sense the order of the opening credits starts with the distribution company or main studio backer. Since this will most likely be and independent distributor that did not finance your film it will appear on its own. It usually is listed as "Distribution Company Presents" followed by the name of the production company.
Cast and Title
The next thing would be the primary or most significant cast members in the film. this is where you would put large celebrity names. It is important to list all main actors however you want it to be less than five. After the most significant cast is listed the title will then follow, traditionally appearing on the screen with a different style or font to the rest of the credits which would typically be in a basic white font.
Cast continued
Now comes the rest of the primary cast, which will include everybody with a reasonable role in the play but not in the main focus in the plot. for example a main character in a secondary part of the play could be listed here with their name and the name of the character that they are playing.
All Other Above The Line Positions
After this you should make sure to list the director of photography, who did the primary score, and who the casting directors were. Follow this by listing all of the producers, both regular and executive, as well as the production designer. Finally you will come to the editor, which brings to an end that list of normal primary positions. Now you have a semi-recap, by listing any primary source the film concept was taken from, as well as who wrote the screenplay.