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John Karna

Acting Born Nov 18, 1991 Houston, Texas, USA 17 credits

Biography

John Karna (born November 18, 1991) is an American film and television actor. He is most well-known for his role as Noah on Scream: The TV Series.

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Known for

Law & Order: Special Victims Unit

as Holden March

Modern Family

as Alec

Chicago Fire

as Alan

9-1-1: Lone Star

as Spence

Dirty John

as Jimmy
Film

Lady Bird

as Greg Anrue

Full filmography

  • Law & Order: Special Victims Unit (1999) as Holden March
  • Modern Family (2009) as Alec
  • Chicago Fire (2012) as Alan
  • 9-1-1: Lone Star (2020) as Spence
  • Scream: The TV Series (2015) as Noah Foster
  • Dirty John (2018) as Jimmy
  • Lady Bird (2017) as Greg Anrue
  • Valley of the Boom (2019) as Marc Andreessen
  • Premature (2014) as Rob Crabbe
  • Sugar Mountain (2016) as Josh Miller
  • Masters of Doom as Tom Hall
  • The Blazing World (2021) as Blake
  • Home Free (2023) as Richard
  • Bindlestiffs (2012) as John Woo
  • The Dead Thing (2025) as Chris
  • Burt (2025) as Punk's Friend
  • Foibles (2025) as Jordan