As seen on all film posters, there are small credits at the bottom of the poster:

the poster is of the award-winning film 'Moonlight' and the film poster contains the film credits at the bottom.
Thanks to
TipSquirrel, I used the credit template:
I replaced the names with mine, the actors and made up names that are not involved in the film. This has made it more realistic rather than having a few names.
This is how it looks:
I could change the font colour front black to white, but I don't think it will improve the poster.