Kat Dennings Wanted to Be Wednesday Addams Growing Up (VIDEO)

10/23/2014 AT 11:15 AM EDT

Kat Dennings may be a well-adjusted woman now, but growing up, she had some unusual fixations.

For starters, she wanted to be Wednesday Addams.

Dennings, 28, said on Conan Wednesday night that she idolized Charles Addams's Goth forerunner growing up, to the point that she'd introduce herself as the character and sleep in the classic arms-folded "vampire" pose.

But Dennings said her parents "didn't care."

"I was their fifth child!" the 2 Broke Girls actress exclaimed, commiserating with host Conan O'Brien (one of six children) about the apathy facing children in large families.

She also shared a picture of herself in her best all-black outfit, which featured her wearing an appropriately serious facial expression.

The fourth season of 2 Broke Girls premieres Monday at 8 p.m. ET on CBS. Check out the full clip from her interview with O'Brien below.