Undergraduate Internship

Hey guys, I am incoming freshmen class of 2019. International student

I really love movies, they are like the essential part of me. And even if I end up majoring in another things, like Economics, I wanted to work in big film companies. Universal, Disney Pixar, 20th century fox, Marvel etc. Maybe I’ll work in sales, finance and marketing departments, not sure yet. Is it possible to do internships in those companies? Anyone here worked in big film companies? What majors do they value other than movie directors, screen writers, actor etc.