Mr. Big is one of the main love interests of Carrie Bradshaw on Sex and the City.  Mr. Big, whose real name is not revealed until the series finale, made his first appearance during the pilot.

Mr. Big Quotes

Mr. Big: So what have you been doing lately?
Carrie: You mean besides going out every night?
Mr. Big: Yeah. I mean, what do you do for work?
Carrie: Well, this is my work. I'm sort of a sexual anthropologist.
Mr. Big: You mean like a hooker?
Carrie: No. I write a column called 'Sex and the City.' Right now I'm researching an article about women who have sex like men. You know, they have sex and then afterwards they feel nothing.
Mr. Big: But you're not like that?
Carrie: Well, aren't you?
Mr. Big: Not a drop. Not even a half of a drop.
Carrie: Wow! What's wrong with you?

(After Carrie gets off Mr. Big's car)
Carrie: Wait! Have you ever been in love?
Mr. Big: Abso-fucking-lutely.