- Shot homemade horror movies as a kid.
- Wrote to Sir Anthony Hopkins for funding help for his second two years at drama school and received money from Hopkins' trust. After finally receiving funding from his local council, Mably offered to send the money back but was told to keep it and spend it wisely.
- Was cast in stage productions of The Breakfast Club, Rush and Faust.
- Landed recurring roles on the BBC dramas Holby City and Dream Team.
- Portrayed the younger Isaac in the Biblical miniseries In the Beginning.
- Played the titular prince in The Prince and Me (2004) and The Prince and Me 2: The Royal Wedding (2005).