The Vampire Diaries star challenged fans to guess her Halloween costume, posting a photo of herself on Instagram rocking red lipstick with the caption, "Trick or treat! A Treat for the first person who can guess what I'll be!"
Nina later revealed her costume, showing herself wearing a house covered in cards. She posed next to co-star Candice Accola in the shot who dressed up as Emerald City.
"@CandiceAccola as "Emerald City" including the yellow brick road,of course. Complete w/the characters on her shoes! Both home made costumes," Nina wrote on Instagram Sunday.
So, what was Nina for Halloween?
House of Cards!
"And to those of you who guessed, for Halloween I was the hit @netflix TVshow "HOUSE OF CARDS"! Home made.And we had a look of fun making it!," Nina wrote on Instagram Sunday.
Nina also dressed up in a Michael Myers' mask paired with a cowboy hat days before.
Did you guess Nina's costume right away?
Sound off in the comments!