The Big Bang Theory trivia, and no cheating...

[Gleb Gamow]

First question, bearing in mind that they'll get harder as the trivia progresses:

What is Penny's last name?

Hint: It's not Penny-Penny.

[goodguyed]

I really can't think of one.

Ever.


....


How about Cuoco?

[Poolie]

First question, bearing in mind that they'll get harder as the trivia progresses:

What is Penny's last name?

Hint: It's not Penny-Penny.

Penny Lane?  . People will just cheat at this. The internet has ruined pub quizzes and the like.

[iWokeUpLate]

We're kind of a superstitious lot here. We've made it this far without knowing Penny's last name. I think we're good not finding out. Penny XXX,

[kolloh]

I don't think her last name was ever released.

[Mitchell]

Penny and her father's surname have not been revealed. Co-creator Bill Prady stated that Penny's last name will be revealed eventually.[27] Executive producer Steve Molaro, however, has since stated her surname will remain a secret.[28]

Which means it's impossible to know what her last name is.

[goodguyed]

Does that mean I win? 

[Gleb Gamow]

I don't think her last name was ever released.

Surely, she has a last name. This is Penny, not Q. Keep guessing, and remember no cheating, but if you do peak and want to post upon discovering the answer, conduct such ambiguously.

[KotL]

penny the big beooob!