
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 is currently starring in Peacock's A.I. mind-bending drama series Mrs. Davis opposite Betty Gilpin.

House
TV • 2004

Shameless
TV • 2011

CSI: Miami
TV • 2002

Cold Case
TV • 2003

What We Do in the Shadows
TV • 2019

The Newsroom
TV • 2012

Greek
TV • 2007

Watchmen
TV • 2019

Limitless
TV • 2015

The Right Stuff
TV • 2020

American Sniper
MOVIE • 2014

Class of '09
TV • 2023

Quintuplets
TV • 2004

Mrs. Davis
TV • 2023

Dopesick
TV • 2021

Lady Bird
MOVIE • 2017

Night Always Comes
MOVIE • 2025

Live Free or Die Hard
MOVIE • 2007