J.J. Abrams, one of the executive producers of Six Degrees (2006), had a small acting role in the film adaptation of John Guare's play Six Degrees of Separation (1993). Guare's play and screenplay are heavily responsible for introducing to the pop culture at large the notion that everyone in the world is separated by only six other people (also known as the "Milgram Small World phenomenon, after the social psychologist Stanley Milgram, who conducted acquaintance path experiments).