This movie is meant to make fun of the legends of King Arthur and the Holy Grail, and has proven to be wildly popular.  But be warned...this is not nice family entertainment.  Indeed, it shows the Middle Ages as ugly, filthy, and gruesome.  There is violent bloodshed and people dying of plagues.  Indeed, perhaps the funniest line is how one peasant can recognize the king: "He doesn't have [excrement] all over him!"