Paul Varjak: Holly, I'm in love with you.
Holly Golightly: So what?
Paul Varjak: So what? So plenty! I love you. You belong to me.
Holly Golightly: No. People don't belong to people.
Paul Varjak: Of course they do.
Holly Golightly: I'm not going to let anyone put me in a cage.
Paul Varjak: I don't want to put you in a cage. I want to love you.
Holly Golightly: It's the same thing.
Paul Varjak: No it's not. Holly...
Holly Golightly: I'm not Holly. I'm not Lula Mae, either. I don't know who I am! I'm like cat here, a couple of no-name slobs. We belong to nobody and nobody belongs to us. We don't even belong to each other.
Near the end of the movie, when George Peppard is talking to Audrey Hepburn in the alley and it's raining heavily, his hair switches between being combed back and combed to the side. Very obvious - this takes place several times.
Audrey Hepburn gave birth to a nine pound baby three months before filming this movie yet she's still amazingly thin in the film.