We may all think we're comedians, but sadly, we're not. Good thing there are so many truly funny people out there to make us laugh. Some comedians use their wit and smarts to make clever jokes and poke fun, while others use their physicality and appearance to to keep us doubled over. Formats range from stand up comedy and sketch comedy to talk shows, and subjects include politics, everyday life, and the comedians themselves. Here's a look at the famous comedians who've kept us laughing over the years.