1 of 15 John P. Johnson/HBO
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Vampire: True Blood's Eric Northman (Alexander Skarsgård)
The vampires living in Bon Temps, La., aren't exactly popular with the locals, especially the arrogant, violent Eric Northman. But that doesn't stop Sookie from having sex dreams about him. When he's not running the vampire night club Fangtasia, Eric is the sheriff of Louisiana’s Area 5.
2 of 15 John P. Johnson/HBO
Werewolf: True Blood's Alcide Herveaux (Joe Manganiello)
The hunky Alcide is sent by Eric to help Sookie after Bill goes missing. But during their hunt, some serious sparks fly between the big-hearted were and the mind-reading waitress — much to Bill's chagrin.
3 of 15 John P. Johnson/HBO
4 of 15 Summit Entertainment
Vampire: Underworld's Selene (Kate Beckinsale)
Selene isn't your typical vampiress. The expert in both medieval and modern weaponry joined the Death Dealers specifically to seek vengeance on the Lycans (aka werewolves). And then she fell in love, with…
5 of 15 Screen Gems
Werewolf: Underworld's Michael Corvin (Scott Speedman)
Though Michael starts out as a human, he's bitten by Lycan leader Lucian, thus transmitting that pesky werewolf "virus." But when he's nearly killed, Selene bites Michael, making him the first Vampire-Lycan hybrid. Fancy.
7 of 15 20th Century Fox/Everett Collection
Vampire: Buffy the Vampire Slayer's Angel (David Boreanaz)
A gypsy curse reformed his sadistic soul, after which he strove to atone for his past sins. He and Buffy have a typical courtship: She sends him to hell and they’re only reunited when he's inexplicably resurrected. The usual.
8 of 15 20th Century Fox/Everett Collection
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Werewolf: Buffy the Vampire Slayer's Daniel "Oz" Osbourne (Seth Green)
Who knew werewolves could be so quirky? As the lead guitarist of the band Dingoes Ate My Baby, Oz discovered he was a creature of the night later in life — but that didn't faze girlfriend Willow (cutest couple ever).
10 of 15 Bob Mahoney/The CW
Vampire: Vampire Diaries' Damon Salvatore (Ian Somerhalder)
While Damon and his brother Stefan are blood-sucking brothers, Damon is obviously comes from the "bad boy" gene pool. But there is one thing Damon has in common with his bro: They both have a thing for same girl, Elena.
11 of 15 Bob Mahoney/The CW
Werewolf: Vampire Diaries' Mason Lockwood (Taylor Kinney)
Tyler only learned a bit about the Lockwood family's werewolf curse from his uncle Mason before Damon, a vampire, killed him.
12 of 15 Quantrell Colbert/The CW
13 of 15 Summit Entertainment
Vampire: Twilight's Edward Cullen (Robert Pattinson)
This "vegetarian," pretty-boy vampire, who has retained the appearance of a 17-year-old, won the hearts of tweens everywhere by demonstrating his undying love for and devotion to Bella.
14 of 15 Summit Entertainment
Werewolf:Twilight's Jacob Black (Taylor Lautner)
Jacob was initially only a minor character in the franchise, but by the second and third installments, the Native American werewolf fought to win Bella's heart — mainly shirtless.
15 of 15 Summit Entertainment