John Allen McDorman IV is an American actor. On television, he headlined the CBS comedy-drama Limitless (2015-2016) and was the male lead of the sitcoms Are You There, Chelsea? (2012) and Manhattan Love Story (2014). He was also a series regular 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 the Disney+ historical drama The Right Stuff (2020) as Alan Shepard.
Studied with Nancy Chartier in Dallas for two years before going to L.A. for his first pilot season, where he signed with a manager and booked a recurring role on "Run of the House"- the first of many series to come.