2014 – Niall joined the West End cast of Miss Saigon as a member of the Ensemble and first cover for the lead role Chris.
2013 – Niall was in the West End cast of Les Miserables in the role of Feuilly and first cover Enjolras.
2012 – actor and singer Niall Sheehy made it to the final eight on ITV’s Superstar.
2010-2011 – Niall was in the company of Wicked in the West End alongside Lee Mead and Rachel Tucker, he understudied the lead roles of Fiyero and Dillamund.
2012 – Niall starred as the Prince in Snow White at the Tivoli Theatre, Dublin.
Niall is originally from Wicklow, Ireland. He trained at Mountview Theatre School in London.