This is a list of filmmakers' signatures or Easter eggs that are found in many of their works which become signatures or trademarks. These are usually inconsequential small elements like signs which are inside jokes, cameos or references to other works. For this list, the term filmmakers is used loosely and would include directors, producers, actors, animators, and production companies.
Heerden, Bill van (2008-08-28). Film and Television In-Jokes: Nearly 2,000 Intentional References, Parodies, Allusions, Personal Touches, Cameos, Spoofs and Homages. McFarland. ISBN 9780786438945.