What actors and actresses appeared in Iris - 1968?

You're likely thinking of the film "The Iris" (1968). This is a short film by Stan Brakhage, and it is not a feature film with actors and actresses.

"The Iris" is an experimental film focused on abstract imagery and visual textures. It uses a hand-painted film strip to create the imagery, and it's a famous example of experimental cinema.

If you are thinking of a different film titled "Iris" or a film with a similar plot, please let me know the details so I can help you find the cast information!