Nelson is the son of Mark and Janie Nelson and is one of four children.
At one time, he attended Forsyth Country Day School in Lewisville, North Carolina where he performed in their productions of You're a Good Man Charlie Brown and Joseph and The Amazing Technicolor Dreamcoat.
He attended Stagedoor Manor, where he was one of the dancers for the Macy's Thanksgiving Day Parade from 2009 to 2011.
He was prominent featured in the adaptation of The Hunger Games as the Tribute from District 3.
His other film credits include The Judge, Medeas, and Alone Yet Not Alone.