Ian Somerhalder Sinks His Teeth Into the CW's Vampire Diaries.

According to The Hollywood Reporter, Ian Somerhalder (Lost) will be joining the cast of the CW's pilot Vampire Diaries.

The actor will play Damon, vampire who can be both good and bad in an instant.

The show is based on a number of books from Alloy Entertainment. It looks at what happens when a girl falls for two vampire brothers.

Zach Roerig and Kayla Ewell also joined they cast. They will be playing a brother and sister.