system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What are the major costs in producing a movie?
gpt
The biggest expense in a Hollywood movie are people expenses.  The stars get a big part of the price of the film, usually at least half the budget between top stars, co-stars and the rest of the cast.  The screenwriter(s), director, and producers get a big chunk.  Everyone who works on the set is paid a union-scale wage; the gaffers, cinematographers, makeup, riggers, etc.

A big special-effects film will pay an army of people who do modeling, art, animation, motion capture, and building customized tools.  Sit through the credits of one of these films and you'll see and endless list of people who do this work.  These are pretty good paying jobs, and the work can last six months or more.

Then there are rentals for equipment, payments to use exterior and interior locations, royalties for licenses, food service, travel and lodging, and overhead for lawyers, accountants, security, "personal assistants", etc.