What actors and actresses appeared in The Secret of Michelangelo - 1968?

There is no movie called "The Secret of Michelangelo" from 1968. It's possible you are thinking of a different film, or perhaps a television show.

Could you provide more information or details about the movie you're looking for? For example, you could mention:

* The full title of the movie

* Any other details you remember, such as the plot, setting, or actors you think were in it.

This will help me identify the movie you're looking for and provide you with the correct cast information.