The President of the United States of America has been, and probably still is, the most powerful person in the world. The US President also, in many cases, divides opinions around the world. Your opinion on a president not only has social, political, and cultural significance, but is also telling of your values. For this reason and more, these actors must have been pretty nervous playing US presidents.
In most cases, these actors played real former presidents. However, many fictional films have a made-up president, which probably doesn't carry as much weight but plays with our idea of what a president looks like. To see which movies had famous actors take on the role of the US President, click through the gallery.