Canadian actor Russell Posner began acting in TV commercials when he was still in elementary school. He made his debut in the TV movie "Eugene!" (Comedy Central, 2012) in 2012. That same year would find the young actor appearing as Arty in an off-Broadway production of "Lost in Yonkers" with the Actors Company Theater. The following year, Posner found himself in impressive company, appearing alongside Woody Allen, Sharon Stone, Liev Schreiber, and Vanessa Paradis with a small role in the John Turturro-directed comedy "Fading Gigolo" (2013). The experience was monumental, preparing Posner for his breakout performance in the 2015 dark comedy "The D Train" (2015), which he co-starred in alongside longtime hero Jack Black. Now officially on the radar of casting directors, Posner acted in the taut family drama "Louder Than Bombs" (2015) as well as the unconventional war film "Dabka" (2017). Then in 2017, Posner landed another big break when he was cast as Adrian Graff in a TV series adaptation of the popular Stephen King novella "The Mist" (Spike TV, 2017-).