Kyle Steven Gallner (born October 22, 1986) is an American actor. He is known for his portrayal of Cassidy "Beaver" Casablancas in the television series Veronica Mars, superhero Bart Allen in the drama series Smallville and Reed Garrett in the police series CSI: NY, and a lead role as Hasil Farrell in the drama series Outsiders. He is also known for his roles in American Sniper and the horror films Scream, The Haunting in Connecticut, Jennifer's Body, the remake of A Nightmare on Elm Street, and Smile.

Early life
Gallner was born in West Chester, Pennsylvania, to Larry and Mary Jane Gallner. He has three siblings: one older sister, one younger brother, and a younger sister. Gallner attended West Chester East High School. He started his career by following his sister along to one of her auditions. His father's family is Jewish.