What actors and actresses appeared in Prinsessa ja veli - 1989?

"Prinsessa ja veli" is a Finnish film released in 1989. However, the title you provided ("Prinsessa ja veli") is not a known film title.

Could you double-check the title or provide any other information about the movie, like the director, or a brief plot summary? This would help me identify the film and find the cast information for you.