What actors and actresses appeared in An American Potter - 1977?

There is no movie titled "An American Potter - 1977". It is possible that you have the title slightly wrong.

Do you mean "An American Werewolf in London" (1981)? If so, the main actors are:

* David Naughton as David Kessler

* Jenny Agutter as Laura

* Griffin Dunne as Jack Goodman

* John Wood as Dr. Hirsch

* Paul Azsman as Sam

* Don McKillop as the Werewolf

If you have a different movie in mind, please provide more details so I can help you find the cast.