What actors and actresses appeared in It Happened One Night - 1978?

There was no movie called "It Happened One Night" released in 1978. The movie "It Happened One Night" you're thinking of is from 1934, starring Clark Gable and Claudette Colbert.

If you're looking for a movie from 1978 with a similar plot or theme, you may be thinking of a different film. Could you provide more information about the movie you are looking for?