“I saw... its thoughts. I saw what they're planning to do. They're like locusts. They're moving from planet to planet... their whole civilization. After they've consumed every natural resource they move on... and we're next. Nuke 'em. Let's nuke the bastards.”

Bill Pullman - President Thomas J. Whitmore

“Guys, before we start the tape, one more thing - what's up with anal probing? I mean, do they really come billions of light years just to...”

David Cross - Newton

“- Frank the Pug: Listen, partner. I may look like a dog, but I only play one here on Earth.
- Jay: OK, wipe your mouth.”
Tim Blaney - Frank the Pug
Will Smith - Jay

“My name is General Zod. I come from a world far from yours. For some time, your world has sheltered one of my citizens. I request that you return this individual to my custody. For reasons unknown, he has chosen to keep his existence a secret from you. He will have made efforts to blend in. He will look like you, but he is not one of you.”

Michael Shannon - General Zod

They were a group of intergalactic refugees. Wanted to the use the earth as an apolitical zone for creatures without a planet. Did you ever seen the movie "Casablanca"? Same thing, except no Nazis. We agreed, and we concealed all the evidence of their landing.

Tommy Lee Jones - Kay