- Father is Irish-American and mother is British.
- Lived with his aunt and uncle in Cameroon when he was 17.
- Played with the band Shadyside for five years before becoming an actor.
- Played Elvis Presley in the West End production of Million Dollar Quartet in 2011.
- Kevin Malarkey — Brother
- Jim Malarkey — Father
- Nadine Lewington — Wife
- Daniel Malarkey — Brother
- Nadia Malarkey — Mother
- London Academy of Music and Dramtic Arts, London, England