Kaley Cuoco stars as Penny, Sheldon and Leonard's beautiful next door neighbor.  Penny is an aspring actress that currently works at the local Cheesecake Factory.

Penny moved across the halls from the boys after her split from her boyfriend of four years, Kurt.  She briefly dated Sheldon, but it did not work out due to her insecurity about her intelligence.

Penny Quotes

Penny: I give up, he's impossible
Sheldon: I can't be impossible, I exist. I believe what you meant to say is, "I give up, he's improbable."

Penny: Hey, Sheldon, did you change your Wi-Fi password again?
Sheldon: Yes, it's "Penny, get your own Wi-Fi." No spaces.

TBBT Quotes

Mrs. Cooper: Shelly! I'm so glad you're here!
Sheldon: I saw you having naked sex.

Penny: I give up, he's impossible
Sheldon: I can't be impossible, I exist. I believe what you meant to say is, "I give up, he's improbable."