Mark Polish (born October 30, 1970 in El Centro, CA) is an American actor, writer and director, best known for his work with his identical twin brother Michael, including "Twin Falls Idaho" (1999), "Northfork" (2003) and "The Astronaut Farmer" (2006). In the early 2010s, after their work together on "For Lovers Only" (2011), the Polish brothers turned to focus on their separate solo careers, with Mark going on to direct "Against the Clock" (2019) and "Murmur" (2022).