The film industry consists of filmmaking institutions that create and distribute films for entertainment. The UK film industry is rapidly growing and generated £11 billion at the box office in 2012. The film industry includes occupations like film production, screenwriting, and actors. Warner Brothers and Universal Studios are major private sector film companies that receive income from advertising and box office sales. Warner Brothers is owned by Time Warner and Universal Studios is owned by NBCUniversal, which owns several subsidiary companies. Controlling the entire film production and distribution process maximizes profits by reducing costs compared to outsourcing those services. The film industry is also related to photography and advertising industries which provide promotional materials like posters.