Aiden uses the surname of Gillen because someone else was already registered as Aidan Murphy in the Actors' Guild. Gillen is his mother's surname.
The hardest role he has played was Platonov, the one he is most satisfied with was Ariel in The Tempest.
He has a sister who's also an actress.
His mother is a nurse and his father a draughtsman.
He has two children: Berry and Joe.
He lives with Olivia O Flanagan since July 7, 2001.
He is 5'10" (1.78 m).
He began his acting career as a teenager with Dublin Youth Theatre.
He was nominated for a Tony award for his highly acclaimed Broadway role in "The Caretaker" in 2003.
As of 2006 he lives in London with wife Olivia and their children, daughter Berry and son Joe.