I think Atonement is one of the saddest movies ever. Sadder than Titanic. Come to think of it, it's maybe even sadder than Romeo and Juliet.. everytime I watch it I cry my eyes out. It's beautifully made, too, and the actors are just great.
but moving on the fashion side of it - I want to kiss the costume designer, whoever he/she is. If I could, I'd dress like Cecilia Tallis every day of my life.