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Nina Dobrev and Kat Graham play two of the greatest BFFs on television: Elena Gilbert and Bonnie Bennett. These two have been fighting off vampires and other supernatural creatures for almost five seasons of The Vampire Diaries, and we’ve loved every minute these two share on-screen. With the end of Season 5 quickly approaching, we got curious: Which leading lady is older?

Wetpaint Entertainment asked Viggle LIVE! users that exact question during the April 17 episode of The Vampire Diaries Season 1, Episode 18 (“Resident Evil”) — and the results are in.

Want to join in on the fun? Earn rewards by downloading the free Viggle app!

This one was pretty close, with only 33 percent of voters correctly guessing Nina is the older of these two besties. The majority of voters, 40 percent, actually thought Kat was older while the remaining 27 percent were convinced these two were the same age.

Nina was born on January 9, 1989, in Sofia, Bulgaria, while Kat was born on September 5, 1989, in Geneva, Switzerland. These two European beauties are really close in age, though. Nina recently turned 25 while Kat will ring in the big 2-5 later this year.

The Vampire Diaries airs Thursday nights at 8 p.m. ET on Bravo.

Do you want to test your TV knowledge? Not only is it easy, but you also get rewarded just for watching your favorite shows! All you have to do is download the Viggle app, get watching, and check into Viggle LIVE!

Carson Blackwelder is an Assistant Editor at Wetpaint Entertainment. Follow him on Twitter and Google+!