I once did a list for a friend of the ten sexiest female characters in the movies. Veronica Lake's lovely witch ranked very high on that list. Although she starred in several other classic films from 1942 to 1946, this movie is easily my favorite. Much of her reputation today is based on her several appearances in film noir classics (THIS GUN FOR HIRE, THE GLASS KEY, and THE BLUE DAHLIA), but I actually preferred her in this film and to a lesser degree SULLIVAN'S TRAVELS.
The rest of the cast is just as delightful. Fredric March is everything you could ask a romantic lead who is descended from Puritans to be, and Cecil Kellaway and Robert Benchley take turns stealing scenes.
Of all the European directors forced by political turmoil in Germany and Italy to work in the US temporarily in the thirties and forties, Rene Clair probably had the most successful record. While his best work remains the extraordinary films he made in the early thirties working in France (SOUS LES TOITS DE PARIS, À NOUS LA LIBERTÉ, and, my favorite Clair film, LE MILLION), he nonetheless managed to make some exquisite films both in England (THE GHOST GOES WEST) and the US (IT HAPPENED TOMORROW and the marvelous comic mystery film AND THEN THERE WERE NONE).
Much is made of the fact that I MARRIED A WITCH inspired the sixties TV show BEWITCHED, but I think this can be overdone. BEWITCHED was a situation comedy, whereas I MARRIED A WITCH depends much more on the irony of a witch falling in love with the ancestor of the Puritans who had cursed her a few hundred years before. In BEWITCHED, it is immaterial who Darrin and Samantha's forebears were, whereas the heart of the movie depends on ancestry.
All lovers of classic comedy, classic Hollywood, or classic directors should definitely see this film if they haven't already.