I love that quote already, e-j-e.
“Here’s Johnny!”
Jack Torrance, The Shining.
My favorite quote, ever.
“The greatest honor history can bestow is the title of peacemaker.” – Richard Nixon
“Forget it, Jake, it’s Chinatown.”
Lawrence Walsh, Chinatown.
“Woah! I knew I shoulda dun’ carry-on!”
[size=92]- Mater, Cars 2[/size]
“I have always depended on the kindness of strangers.”
Blanche DuBois, A Streetcar Named Desire.
“Wine is sunlight held together by water”
-Galileo
That is the second time you have spoken out of turn, Miss Granger. Tell me, are you incapable of restraining yourself, or do you take pride in being an insufferable know-it-all?
-Snape, HP3
“Open the pod bay doors, HAL.”
Dave Bowman, 2001: A Space Odyssey.
“We wouldn’t have got anywhere, if it weren’t for you, boy.”
[size=92]- Centipede, James and the Giant Peach[/size]
Great one!
Umbridge: You originally applied for the position of Professor of Defense Against the Dark Arts, am I correct?
Snape: Yes…
Umbridge: But you were unsuccessful?
Snape: Obviously…
-HP5
“Be yourself, because the people that mind don’t matter and the people that matter don’t mind!”
-Dr. Suess
Ted Striker: “Surely you can’t be serious!”
Dr. Rumack: “I am serious… and don’t call me Shirley.”
Airplane!
Ah, Dr. Seuss…what a genius! 
“I don’t want to survive: I wanna live!”
[size=92]- Captain McCrea, WALL•E[/size]
“They make action figures out of you, drummer not included!!”
-Nora yelling at Nick, Nick and Nora’s Infinite Playlist.
Dolores Umbridge: [while being taken away by centaurs] Please, tell them I mean no harm!
Harry Potter: Sorry, Professor, but I must not tell lies.
[size=75]- Harry Potter and the Order of the Phoenix[/size]
Best comeback line in the series. 
That’s certainly one of the best jokes they’ve created for the movies (because it’s not from the books), along with one in Half-Blood Prince.
By the way, expect another line about not telling lies in Deathly Hallows. I’ve already seen that scene and it’s pretty good.
What would that be?
And I suppose you went for a midnight screening of DHPart 1?
This one:
Slughorn: (Referring to Aragog) He had family, I trust?
Harry: (With a grin) Oh, yeah…
Don’t know why, but that one always makes my laugh. Remember Aragog’s family in Chamber of Secrets? It’s a good thing that Harry does.
PS: Harry is hilarious under the effects of the Felix Felicis.
“The blood of the martyred will water the meadows of France”
-Les Miserables
“Yo, Adrian!”
Rocky Balboa, Rocky.