John Allen McDorman IV (born July 8, 1986) is an American actor best known for the 2014 film American Sniper and starring on television shows such as CBS' Limitless (2015–2016) and the Disney historical drama The Right Stuff as Alan Shepard. He is also well known for his roles on the ABC Family comedy-drama Greek (2007–2011), the fourth season of the Showtime comedy-drama Shameless (2014), the revival of the CBS sitcom Murphy Brown (2018), and FX's What We Do in the Shadows. Most recently he was seen on Hulu's award winning Dopesick. He will next be seen starring in Peacock's upcoming A.I. mind-bending drama Mrs. Davis opposite Betty Gilpin.

Early life
McDorman was born in Dallas, Texas, the son of Deborah Gale (née Stallings) and John Allen McDorman III. He has a younger sister, Morgan, and an older half-sister, Amanda. McDorman studied acting at the Dallas Young Actors Studio and Nancy Chartier's Film and Acting Studio. He attended Richardson High School, Westwood Junior High and Northwood Hills Elementary in Texas.