WarGames!
Right-O
You beat me to it. The scene where Matthew Broderick and Ally Sheedy run to catch the ferry was shot a few miles from where I grew up.
These are from classic British comedies, and I don’t know if they’re at all known overseas, so maybe these are unfairly doubly obscure, but what the heck…
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“Forward, the Old Girls!”
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“My memoirs!”
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“It were the only way…”
“I never got around to it. Ok!?” I should have guessed. I missed it and I’ve seen this so many times.
That was a deep track.
Is no 2 Kind Hearts and Coronets?
Kind Hearts and Coronets it is!
‘You gotta be shittin’ me, woman!’
too generic? Easy A.
“You’re a very nosy fellow, kitty cat.”
“Fine looking animal.”
“For a horse, yeah.”
The Godfather?
From the same movie:
A: What exactly was the undergarment just referred to?
B: Panties, Your Honor.
The first one is from The Girls of St Trinian’s? (I think there was more than one.)
Anatomy Of A Murder?
I’m afraid not, sorry. Good guess, though!
Yep, one of my all-time favorite movies. 
The Music Man
Correct! The Music Man.
Known over here as The Belles of St Trinian’s, but yes, you’re right (and it was indeed the first of several)