Keating was born in Leicester to an Irish father and an English mother. His first stage performance was in primary school, playing a cripple in The Ragged School. He then attended Uppingham School.
After graduating from the University College, London with First Class Honours with Distinction, in History, he tried various jobs before deciding to be a professional actor. To obtain his Equity card, Keating worked in a drag act called Feeling Mutual.
- Dominic Keating at Wikipedia