Kyle Gallner (born October 22, 1986) is an American actor. He began acting in 2000, gaining recognition for his roles as Bart Allen in the superhero series Smallville (2004–2009), Cassidy "Beaver" Casablancas in the detective drama Veronica Mars (2005–2006), and Reed Garrett in the police drama CSI: Crime Scene Investigation New York (2006–2010).

In the 2010s, Gallner established himself as a "scream king," appearing in the horror films The Haunting in Connecticut, Jennifer's Body (both 2009), the remake of A Nightmare on Elm Street (2010), Red State (2011), Scream, Smile (both 2022), and its sequel Smile 2 (2024). Among his other films are Dear White People, American Sniper (both 2014), Dinner in America (2020), The Passenger, and Strange Darling (both 2023).

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