A Little Help from My Friends

"Sometimes you gotta do the payback picture because your friend says you owe him." (looks at camera)

Sometimes, to bypass the chore of casting, filmmakers will call upon their friends or previous colleagues to fill the roles, or even just write the roles for them. And then they do it again, and again, and again...

This can lead to actors being primarily associated with one another or a particular director, often leading to the (spiritual or otherwise) formation of movie-making cliques; the Brat Pack, Frat Pack and so on are good examples of this.