Joan of Arc (1948) starring Ingrid Bergman is in my opinion the best and most historically accurate of all the films about the Maid of Lorraine. Ingrid Bergman was not a believer but as an accomplished actress she was able to project the radiant faith of Joan. In fact, Ingrid had great devotion to the saint and herself helped to finance the film. Directed by Victor Fleming and based upon the play by Maxwell Anderson, the movie captures the season of miracles which was Joan's life. Unfortunately, many key scenes were edited from the version usually shown on television. The complete, unedited version has been restored and was released on DVD in 2004. I am dying to see it. Here is an article with several stills from the film, including those from scenes which did not make the final cut.
Novena prayer to St. Joan