Ian Somerhalder, who played Boone on the ABC hit show "LOST," and also appeared in the genre feature PULSE (let's not forget THE RULES OF ATTRACTION either) has joined the cast of the CW's drama pilot "VAMPIRE DIARIES," according to Variety.

Somerhalder is set to play Damon, a smug vampire who can go from playful to evil in a split second. Also joining the cast are Zach Roerig ("Friday Night Lights"), who will play the jock Matt, and Kayla Ewell ("Entourage"), who will play Matt's sister. Previously announced cast includes Nina Dobrev and Steven R. McQueen.

"VAMPIRE DIARIES," based on a series of books from Alloy Entertainment, centers on a woman who falls for two vampire brothers - one good and one evil. Warner Bros. TV is behind the project, along with Alloy and Outerbanks Ent.