What actors and actresses appeared in O xypolytos pringips - 1966?

You're likely referring to "Oedipus Rex", a play by Sophocles, which was adapted and directed by Pier Paolo Pasolini in 1967, not 1966. This film adaptation of the classic Greek tragedy featured the following cast:

* Franco Citti as Oedipus

* Silvana Mangano as Jocasta

* Paolo Bonacelli as Tiresias

* Pier Paolo Pasolini as Creon

* Serge Reggiani as the Messenger

* Ugo Tognazzi as the Shepherd

* Giulia Lazzarini as Eurydice

* Luciano Scavone as a Chorus Member

There is no record of a film or theatrical production titled "O xypolytos pringips" in 1966.