27. 'Critters 3' (1991)
The third installment of the low-budget sci-fi horror comedy franchise about cuddly little monsters is now notable mainly for being DiCaprio's big-screen debut (even if the movie wound up going straight to video). Here, he plays a troubled, floppy-haired skate-punk tween who joins a family trapped in his dirtbag dad's tenement building as it's terrorized by these man-eating furballs. Sure, it has a low-rent, get-high-and-watch-it-at-3-AM vibe to it, but the film's mind-numbing longueurs and its dialogue do away with any Z-movie verve one might be expecting. DiCaprio isn't too bad as a pissy kid; indeed, he seems to be the only cast member who can actually act.