QUICK FACTS
Nationality Ireland
BIOGRAPHY
Cillian O’Sullivan is an Irish actor, whose talent on stage, in the initial stages of his career, helped him obtain a role in his country’s mini-series, The Running Mate (2007 ) , sharing credits with Denis Conway and Don Wycherley, a debut that earned him new opportunities on television, in series such as Seacht (2010-2011) and 6Degrees (2012-2015), before moving to the United States and settling in New York, where he has continued to develop his career in series such as Taken Down (2018), The Blacklist (2019) and In from the Cold (2022), among others.