- Played the oboe in the South Glamorgan Youth Orchestra.
- Made his movie debut in 1997's Wilde, playing the Irish writer's lover.
- Met wife Alice Evans on the set of 102 Dalmatians in 2000.
- Fellow Welsh actor Matthew Rhys (Brothers & Sisters) was best man at Gruffudd's 2007 wedding. The longtime friends were once roommates in London and have also worked together (playing a gay couple in the 2001 film Very Annie Mary).
- Had a brief but memorable scene as an officer in the blockbuster film Titanic (1997); later worked with Titanic director James Cameron in the action film Sanctum (2011).
- Gillian Gruffudd — Mother
- Ella Betsi Evans Gruffudd — Daughter
- Siwan Gruffudd — Sister
- Elsie Marigold — Daughter
- Alice Evans — Wife
- Alun Gruffudd — Brother
- Peter Gruffudd — Father
- Royal Academy of Dramatic Arts, London, England (1998)
Season 8, Episode 18
- Birth Place: Cardiff, Wales
- Birthday: October 6, 1973, Libra
- Profession: Actor
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