Johnson was born on September 1, 1987, in Fort Worth, Texas. In 2001, he made his debut at the theater in a production of the musical made Peter Pan. After joining the American tour of A Chorus Line in the role of Mark, Johnson debuted on Broadway in 2009 in the musical Hair as a member of the ensemble and the first substitute for Gavin Creel in the role of Claude. In 2010, he played the protagonist Jack Kelly in one of the first readings of the musical Newsies.
In 2011, Johnson replaced Aaron Tveit for the part of Frank Abagnale in the musical Catch Me If You Can. In 2013, he returned to Broadway in the musical Hands on a Hard Body.
In 2016, Johnson was cast in the recurring role of FBI recruit, Will Olsen on the ABC thriller series Quantico.
