Box Office Mojo: Freely available website with comprehensive box office statistics.
The Internet Movie Database (IMDb): Popular and authoritative source for movie, TV and celebrity content.
Cineaste (1990 - present available full-text from Academic Search Elite)
CineAction (2001 - 2016 available full-text from Academic OneFile)
Cinema Journal (1996 - present available full-text from Academic Search Elite)
Film Comment (2002 - present available full-text from Academic Search Elite)
Film Criticism (1985 - present available full-text from Academic Search Elite)
Film History (2000 - present available full-text from Academic OneFile)
Journal of Popular Culture (full-text is available in print from 1967 - present)
Journal of Popular Film and Television (1990 - 2016 available full-text from Academic Search Elite)
Literature Film Quarterly (most issues since 1973 are available in various databases; use the "Search within" box here; issues since 2017 are freely available online)