Will Beinbrink was born in Bethesda, Maryland, a place that would shape his early life, as his father, a Naval Captain, would frequently relocate their family to various parts of the world. This included stints in Italy, Korea, Texas, and New York, before ultimately settling in San Diego, California.
Growing up, Beinbrink was a highly competitive athlete, traveling extensively throughout the country to participate in soccer and volleyball tournaments. However, a temporary surfing injury would alter his course, prompting him to take up a drama elective at La Jolla High School in its place.
It was during this drama elective that Beinbrink would collaborate with actor/musician Blake Sennett on the production of "And They Danced Real Slow in Jackson," which would go on to become a finalist for the Best High School production in Southern California. This experience would be a pivotal moment in Beinbrink's life, as it would introduce him to Doug Jacobs, co-founder of the San Diego Rep Theater, who would encourage him to audition for The Juilliard School in New York City.
Beinbrink would go on to become a member of Crew 32 at Juilliard, alongside classmates Jessica Chastain, Jess Weixler, Michael Urie, and Luke McFarlane. During his summers and after graduation, he would perform in numerous regional theater productions, including "Arms and the Man" and "The Shape of Things" at Barrington Stage Company, as well as the Ovation-nominated play "Caught" at the Zephyr Theater.
In addition to his work in regional theater, Beinbrink has also performed in numerous Shakespeare productions, including productions at Shakespeare on the Sound, Seattle Shakespeare Company, and The Los Angeles Shakespeare Festival.
Since relocating to Los Angeles, Beinbrink has worked in several films, including "Cellular," "Fuel," and "Barracuda," as well as numerous television shows, such as "It's Always Sunny in Philadelphia," "Medium," "The Unit," "Castle," "ER," and "Numb3rs." Today, he splits his time between New York and Los Angeles, working in both theater, film, and television.