Her character changed a lot over the series, but one thing stuck with her.

No matter what I do after this.

This is what made us who we are.

Kaley Cuoco on the red carpet

We were here for 12 years.

This is a big part of our career."

However, there was one part of Penny’s look that stuck with her from episode one.

Penny and Leonard on their first date

It was basically a main character in its own right.

She was often seen in flannel shirts and button-downs.

Penny is also a massive advocate for some funky pajamas, but can glam it up too.

Over 12 years, Cuoco developed Penny into what felt like a full human being.

And talking toiNews,Cuoco said she lent into her role.