The term 'fourth wall' is an expression that was born in the art of theatre. It can be defined as an invisible wall separating yourself from what you are watching; in this case it is the film. So in order to beak the fourth wall, the character will directly communicate to or at least acknowledge the audience. This can also be known as meta-reference.
An often used technique, the fourth wall can be broken in many forms, from books, to theatre and even in video games, however most famously in movies. The films included here are not intended to be a list of the greatest films and some of them are personal favourites on the use of meta-reference, so do bear this in mind.
With so many examples of these breaks, ranging from the work of Marx brothers to Wayne's World, it would be near impossible to cover every sample. So please, read on and observe our 20 memorable films that all break the fourth wall.