When it comes to sexy vampires, it's hard to compete with Rob Pattinson, but Kellan Lutz does a pretty great job. The former teen model broke into the big leagues when he snagged the role of the beefy Emmett Cullen. He soon became a red-carpet regular, often posing with girlfriend AnnaLynne McCord by his side. He earned even more fans when he stripped down for his sexy 2010 Calvin Klein X underwear campaign -- but as his celebrity status changed, so did his relationship status. Things ended with the 90210 star, but he quickly rebounded with Sharni Vinson, an Australian actress whom he's been dating for over a year. (The pair met while reading for Step Up 3D). Kellan can next be seen flexing his (vocal) muscles as the title character in a new, big screen adaptation of Tarzan. But sadly, there will be no Lutz in a loincloth -- the film is animated!