This document summarizes the origins and conventions of romantic comedy (rom-com) movies. It discusses how the rom-com genre originated from a combination of screwball comedies and nervous romanticism. It then outlines several common conventions in rom-com trailers, posters, promotional packages, and magazines, such as the use of voiceovers, kissing scenes, billing blocks, shots of the main characters, and feminine colors. Overall, the document provides an overview of the typical origins and promotional elements of rom-com films.