His great-grandfather was Irish.
He grew up in Pollok, part of the south side of Glasgow's housing schemes.
Was raised in a large Catholic family.
Has been in two films that won Best Picture: Braveheart (1995) and The Departed (2006).
Despite his being born in Glasgow, Scotland, he has played Irish characters several times, notably his well-known role as Stephen in Braveheart (1995).
Appeared with John Kavanagh in both Braveheart (1995) and Some Mother's Son (1996).
Worked with Helen Mirren twice in the same year. He appeared with her in Some Mother's Son (1996) and Prime Suspect 5: Errors of Judgement (1996).
Has twice participated in movies about genocide in Africa; Hotel Rwanda (2004), and Attack on Darfur (2009).
He was a fan of the Harry Potter novels long before being cast in the films. He claims to have read the books several times.
Plays a character named Fitz in both The Departed and Agents of Shield.