Probably my second favorite John Hughes movie (I seem to be going in descending order), I can never get tired of Ferris's antics, no matter how dated they might now seem (would any high school principal be that obsessed over one kid missing 9 days in a semester? And how many has Cameron missed anyway? It's got to be at least that many). Matthew Broderick shines in the title role, as the cocky rich kid who gets away with everything, but has a good heart at his core and does it all for his miserable pal. It's the most lightweight of the John Hughes high school movie canon, but also the most fun. Plus, there's a young Charlie Sheen in a bit part that turned out to be kind of an eerily prophetic role.
Trailer from 1986: