Cameron Monaghan
Year Title Role Notes
2003 The Music Man Winthrop Paroo Television film
2005 The Adventures of Tango McNorton : Licensed Hero Tango McNorton Short
2004-2005 Malcolm in the Middle Chad 6 episodes
2005 Threshold Josh Foster Episode : Blood of the Children
2005 Avatar : The Last Airbender Poi & Ping ( voice ) Episode : The Fortuneteller
2005-2006 Ned 's Declassified School Survival Guide Palmer Noid 3 episodes
2006 Criminal Minds Jeffrey Charles Episode : The Boogeyman ( season 2 , episode 6 )
2007 Shorty McShorts ' Shorts Andy Episode : Flip-Flopped
2009 Numbers Todd Episode Jacked ( season 5 , episode 12 )
2009 James Gunn 's PG Porn Young Boy 1 Web episode : Helpful Bus
2009 The Mentalist Elliot Episode : Blood Brothers ( season 1 , episode 22 )
2009 Safe Harbor Larry Parker Television film
2009 Monk Danny Cooper Episode : Mr. Monk 's Favorite Show ( season 8 , episode 1 )
2009 Three Rivers Auden Drinkwater Episode : Place of Life ( season 1 , episode 1 )
2009 Fringe Tyler Carson Episode : Of Human Action
2010 The Glades Shane Conners Episode : Marriage is Murder
2010 Terriers Cody Grice Episode : Pimp Daddy
2011-present Shameless Ian Gallagher Main cast
2011 NCIS Nick Peyton Episode : Out of the Frying Pan ( season 8 , episode 18 )
2011 Rizzoli & Isles Jonathan McKenna Episode : Do n't Hate the Player
Filmography -- Television
Cameron Riley Monaghan (born August 16, 1993) is an American actor and model. Beginning with his professional career as a child model at the age of three, and child actor at the age of seven, Monaghan is best known for his role as Ian Gallagher on the Showtime comedy-drama series Shameless. He has also appeared as twins Jerome and Jeremiah Valeska, characters who explore the mythology of and act as possible origins to DC Comics supervillain the Joker on the Fox crime series Gotham, and as Cal Kestis in the action-adventure game .