Cameron Riley Monaghan is an actor and model best known for his role as Ian Gallagher on the Showtime comedy-drama series "Shameless," and He twin brothers Jerome and Jeremiah Valeska, in the Fox crime series "Gotham."

Monaghan first came to national attention in 2003 for his role as Winthrop Paroo opposite Kristin Chenoweth and Matthew Broderick in the ABC television adaptation of "The Music Man." He later appeared in "Malcolm in the Middle," which earned him the Young Artist Award as Best Young Television Actor in a Recurring Role in 2004. The following year, he began a recurring role as Palmer Noid on the Nickelodeon situation comedy "Ned's Declassified School Survival Guide," and subsequent guest-starring television roles followed, including appearances on "Criminal Minds", "Numbers", "The Mentalist", "Monk", "Three Rivers", "Fringe", "The Glades", and "Terriers".

In 2010, Monaghan received his breakthrough role in the Showtime comedy series "Shameless" portraying Ian Gallagher. Nearly five years late, Monaghan received a Critic's Choice Award nomination for Best Supporting Actor in a Comedy Series, and continued on with the series until 2018. The following year he announced that he would be reprising his role in the tenth season. In addition to his role on "Shameless", Monaghan has appeared in a variety of episodic television roles, including "NCIS," "Rizzoli & Isles," "Law & Order: Special Victims Unit," and "Gotham." He has also held roles in a variety of feature film roles like "Prom," "2nd Serve," "Jamie Marks Is Dead," "The Giver," and "The Vampire Academy."

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