Teaser trailers are short previews released months before a film to generate anticipation, revealing brief snippets without much plot. Theatrical trailers are full-length previews released closer to the film, running 2-5 minutes and providing more details about the story and exact release date. Teaser trailers are under 2 minutes and focus on exploiting famous actors/directors to attract interest without fully explaining the narrative, whereas theatrical trailers are longer and more heavily edited to convey the plot.