Barry came to prominence in the 2017 film 'The Killing of a Sacred Deer' with his truly terrifying portrayal of Martin,an American teenager exacting a grisly revenge on drunken surgeon Colin Farrell, but he was not an American nor a teen-ager, born in Dublin on 17th October 1992 and has a brother Eric. From the age of thirteen he was raised by a grandmother and got into acting by answering an advert for non-professionals to train at a school called the Factory. Beginning in Irish soap Fair City' he played Irish roles in the likes of '71' but in 2017 bagged the role of Martin as well as appearing in the lauded 'Dunkirk. In addition to acting Barry is a talented amateur boxer, representing the Celtic Core and is an ambassador for Dior.