Every friend group needs a Penny.

Leonard and Sheldon decide to whip out the Klingon while Penny and Amy respond in Ubbi Dubbi

Kaley Cuoco goes on a blind date with a pittie who was abandoned and introduces her to a goat!

The best Big Bang Theory episodes understand exactly what the show is and is trying to be, but its original pilot did not. The Big Bang Theory used to be a very different show, and it certainly was not a good one. The original Penny was fired, cast member...

Penny learns that the secret to dealing with Sheldon is to parent him.

“Everyone thinks she's so nice with that squeaky little voice.”

The Penny-and-Leonard duo has fans at an autograph signing questioning it's legitimacy.

Penny may not be book smart, but she is savage smart. For this list, we’ll be looking at Penny’s fiercest, most badass, and occasionally brutal comebacks and takedowns throughout this long-running sitcom. Our countdown includes Penny's magic potion, messi...

If we had a penny for all the times Penny was a savage on "The Big Bang Theory." For this list, we’ll be looking at Penny’s fiercest takedowns and most cutting comebacks on the long-running sitcom. Our countdown includes messing with Raj, Sheldon's an ali...