What actors and actresses appeared in Thora on the Straight Narrow - 1993?

You're likely thinking of the 1958 film "A Certain Smile" which features Rossano Brazzi, Jean Seberg, and Bradford Dillman. The title was inspired by the 1952 novel "Thora of the Straight Narrow" by H.E. Bates. No film was ever made with the exact title "Thora on the Straight Narrow" that I'm aware of.