Here's one for the CW's Christmas stocking: Mia Kirshner has just signed up for a recurring role on 'The Vampire Diaries.'

The Ausiello Files confirms that the 'L Word' siren will play Isobel, wife of Matt Davis' history teacher, Alaric. Her character will be charming -- but with some serious bite, of course.

Kirshner is known primarily for her portrayal of Jenny Schecter on the Showtime drama 'The L Word,' a job she held from 2005-2009. She's also put in three solid appearances on '24', and has had significant roles in 'Not Another Teen Movie' and 'The Black Dahlia.'