The premise
Amid a peasant uprising, a feckless prince masquerades as a commoner and blunders his way through low society. And falls for the leader of the revolution.
A few words on genre
Inasmuch as a main plot point of the story pertains to a dashing prince finding himself inexplicably hung up over some penniless indigent, I think it is more or less safe to call it a fairy tale. But let's not forget its absurd gags, its superfluous musical numbers, its slaphappy homosexuality, its cloying romance, its unabashed anachronisms. What we've got, then, if we wish to be as accurate as possible, is a gay screwball fairy tale romance musical, with the occasional helping of 1930s Hollywood. God preserve us.