Nelson is the son of Mark and Janie Nelson and is one of four children. He is also a trained singer, dancer, and actor, and has been featured in the Macy's Thanksgiving Day Parade in New York City for the past three years. In 2011 and 2012 (10th and 11th grades), Nelson attended school at Forsyth Country Day School in Lewisville, North Carolina.
|2012||The Hunger Games||District 3 Tribute Boy|
|The World Is Watching: Making the Hunger Games||Himself||Documentary|
|2013||Alone Yet Not Alone||Young Owen|
|The Best of Me||Jared|
|2015||The Boy Next Door||Kevin|
|2013–Present||Teen Wolf||Young Derek Hale||3 episodes|
|2014||[riminal Minds||William Pratt||Episode: "Hashtag"|