Kyle Gallner had his first major role in the HULU TV Series Veronica Mars, where he appeared in 25 episodes. He has made many notable appearances in independent films, including Gardens of the Night (2008), Beautiful Boy (2010), Red State (2011), Little Birds (2011), Magic Valley (2011) and Smashed (2011).
In 2020 Gallner had a starring role in the award-winning indie film Dinner In America, and in 2022, he starred in two of the biggest horror films of that year, Scream and Smile. Gallner is married and has two children.