Mia is quite a character herself: former apache dancer and stripper, probably once a hooker, also a committed political idealist who is taking nursing classes in order to volunteer against the fascists in her native Spain.
One thing leads to another, and a few years later he's invited to join her in Paris, where she is now a famous photographer and lives with her model Mia ( Penelope Cruz). Although Guy should be beneath her radar, she kind of likes him, and he of course is smitten. Her affairs are legion, her behavior notorious. Her father, played by the alarming British actor Steven Berkhoff, is a French millionaire. He is Guy ( Stuart Townsend), and he offers Gilda refuge from the campus scouts he knows she's having an affair with one of the dons (who at Oxford are professors, not gangsters, with occasional exceptions, especially in earlier centuries). This is a device to tip off the audience that it's not going to be entirely about the school days of a young woman who pops up in the rooms of an Oxford undergraduate one night. The movie begins with a fortune teller who predicts amazing things in Gilda's 34th year.