Start the Revolution Without Me (1970) is near the very top of my list of favorite films.
It's so close to the top because it may be the funniest film ever made, and that's because it starred Gene Wilder, who is always known for being one of the greatest actors who played comic roles, and Donald Sutherland, one of my all time, all around favorite actors, who is not known primarily for his talent in comic roles.
Gene Wilder and Donald Sutherland play two sets of identical twins, switched at birth, to be raised with the twin that isn't their twin. This happens in the years prior to the French Revolution. It gets more zany and silly than that, continuously.
Dialog sharp and crisp, precise and perfect delivery timing. And silly, silly, silly. I laughed my silly head off every time I watched it. Even the time I watched it with a guy who had no idea of who Louis XVI and Marie Antoinette were, what the French Revolution was, and probably what France is or was either. So the film provided the additional benefit, beside laughing laughing laughing, of showing me that this fellow and I need never go out with each again. Thereby this fellow was saved a great deal of time and future misery, because really there could be no future for two people, one of whom cared a great deal about the French Revolution and the other who didn't know what the word history meant. :)