I am a big fan of Unfaithful because of Diane Lane. She plays an unfaithful wife of a man, who after suspecting that she is cheating on him, confronts her lover. This erotic/psychological thriller is one of few movies of Richard Gere that I liked. I think Lane and Gere have a special chemistry that works on screen. Their films together have been great, see Nights in Rodanthe for example. The movie is a bit dark for a thriller and it really works for this film.
Dirty Dancing/••••Patrick Swayze and ??. When they were practicing her leaf I the lake he sustained an injury that hampered him for the rest of his life. Gossip said these two didn't get along during filming, but if that was true they covered it well.