Getting in a bit late. Gotta mention a few all-time classics:
Dorothy in Wizard of Oz:
"Toto, I've a feeling, we're not in Kansas anymore."
Marilyn Monroe (Lorelei Lee) and Taylor Holmes (Mr. Esmond, Sr.) in Gentlemen Prefer Blondes:
Mr. Esmond: Have you got the nerve to tell me you don't want to marry my son for his money?
Lorelei: It's true.
Mr. Esmond: Then what do you want to marry him for?
Lorelei: I want to marry him for YOUR money.
Scarlett O'Hara in Gone With The Wind:
If I have to lie, steal, cheat, or kill, as God is my witness, I'll never be hungry again.
Party guest to Ben in The Graduate:
I just want to say one word to you - just one word.... 'Plastics.'"
Harry Callahan in Dirty Harry (which he reprises at the end):
"I know what you're thinking. 'Did he fire six shots or only five'? Well to tell you the truth, in all this excitement, i kind of lost track myself. But being that this is a .44 Magnum, the most powerful handgun in the world, and would blow your head clean off, you've got to ask yourself one question: 'Do I feel lucky?' Well do ya, punk?"
and Dirty Harry's most famous line of all, in Suddden Impact:
"Go ahead...make my day."