Seamus Dever . Born: 07/27/1976 in Flint, Michigan, USA Jump to Related Articles Photos Filmography Biography Filmography Actor (9) Castle 2008 - 2016 (TV Show) Actor CSI: Crime Scene Investigation 2008 (Tv Show) Actor CSI: New York 2006 (Tv Show) Actor Charmed 2005 (Tv Show) Actor Ready or Not 2005 (Movie) Marc (Actor) Cold Case 2004 (Tv Show) Actor Monkey Love 2001 (Movie) Aaron (Actor) McBride: The Doctor Is Out... Really Out (TV Show) Actor She's No Angel (TV Show) Actor Biography . Relationships Juliana Dever Actor Wife Leslie Feist Song Performer Cousin EDUCATION Moscow Art Theatre Carnegie-Mellon University Milestones 2009 Landed the role of Kevin Ryan on ABC's "Castle" 2008 Recurring role on Lifetime's "Army Wives" Bonus Trivia . Dever is a lifetime member of the Actors Studio in New York City. . Dever started acting at age 6 by performing in various stage plays throughout Arizona.