Nathan was born and raised in Mississauga, Ontario and is of Trinidadian-Jamaican descent. His aptitude for painting got him accepted to Cawthra Park Secondary School but after realizing his passion for theater he transferred to the Acting program. He received his Post-Secondary education at Ryerson University's Radio and Television program in 2012 and finished by Writing, Producing, and Starring in an original pilot. Remaining devoted to his acting career, he went on to study Strasberg and Meisner with esteemed teachers in Toronto and Vancouver.
- Nathan Mitchell along with Laci J Mailey, Brad Kelly, Doug Jones, Ty Olsson, Kevin Haaland, Woody Jeffreys, Rob Hayter, Michael Rogers, Christopher Pearce, Daniel Martin, Ronald Patrick Thompson, Colin Corrigan, Michael Bean, Billy Wickman, Mark Gibbon, James Tyce, Darren Moore, Tom Stevens, Jason Wingham, Edwin Rodriguez, Zack Daniels, Nico Amoroso, Abi Centrik, Greg Zach, Sylvesta Stuart & Michael Antonakos have all made an appearance in CW's Arrow.