Milton George Katselas (December 22, 1933 – October 24, 2008) was an American director and producer of stage and film, as well as a Hollywood acting instructor and coach who trained under Elia Kazan and Lee Strasberg at the acclaimed Actors Studio in New York City.
In 1978 he acquired the Beverly Hills Playhouse, where he taught a master class for many years.
Katselas was a Scientologist and some former students have alleged that his acting classes were used as recruitment for the Church of Scientology, while others have stated Katselas never mentioned or spoke about Scientology during classes.