Kyle Gallner is an American actor. His Hollywood career all started in the early 2000s. During his beginnings, he made guest appearances on the shows Third Watch and Touched by an Angel. His first notable role was as Bart Allen / Impulse in Smallville. He then became known for his role as Cassidy ‘Beaver’ Casablancas in Veronica Mars. This also marked his first starring role on television. He next played recurring character Jason Embry in HBO’s Big Love. Also in the 2000s, he had notable roles in the films The Haunting in Connecticut and Jennifer’s Body. In the 2010s, he starred in the movie A Nightmare on Elm Street, followed by Red State. He later starred in the movies CBGB, American Sniper, and The Finest Hours. In addition, he played Reed Garrett in CSI: NY and played Zach in The Walking Dead.