Mitch (Tom McCarthy), Cal (Mark Pellegrino), Burdett (Robert Peters), Ronald (Diedrich Bader) and Stewart (Stephen James) in "Certain Guys."

Mark Pellegrino during a live IMDb Twitter Chat. 

Mark Pellegrino at an event for The Walking Dead (2010)

Joan Severance, Hulk Hogan, Tom Lister Jr., and Mark Pellegrino in No Holds Barred (1989)

Kate Beckinsale and Mark Pellegrino in The Trials of Cate McCall (2013)

Mark Pellegrino and Jeremy Allen White in Bad Turn Worse (2013)

Katherine Heigl and Mark Pellegrino in Caffeine (2006)

Breckin Meyer, Mark Pellegrino, Sonya Walger, Roz Witt, and Mike Vogel in Caffeine (2006)

Catalina Larranaga and Mark Pellegrino in Word of Mouth (1999)

Matthew Fox, Jorge Garcia, Josh Holloway, Mark Pellegrino, and Evangeline Lilly in Lost (2004)

Mark Pellegrino and Elle Young in Supernatural (2005)

Misha Collins and Mark Pellegrino in Supernatural (2005)

Mark Pellegrino and Samantha Smith in Supernatural (2005)

Mark Pellegrino, Samantha Smith, and Christian Keyes in Supernatural (2005)

Mark Pellegrino and Naomi Watts in Mulholland Drive (2001)

Mark Pellegrino in The Big Lebowski (1998)

Jeff Bridges and Mark Pellegrino in The Big Lebowski (1998)

Jensen Ackles, Misha Collins, and Mark Pellegrino in Supernatural (2005)