Please again refer to Wikipedia Naming conventions films Conventions Each word in the titles of films takes an initial capital except for articles a an the the word to and prepositions and conjunctions shorter than five letters e g on from and with unless they begin the title The overall Wikipedia Naming conventions capitalization In general each word in titles of books films and other works take an initial capital except for articles a an the the word to and prepositions and conjunctions shorter than five letters e g on from and with unless they begin the title This stems from both The Chicago Manual of Style and Fowler s Modern English Usage As In is a preposition shorter than five letters the correct caps is in There may be flexibility in English titling but Wiki follows the conventions cited above