- Trained as an electrician before finding success as an actor.
- Got the opportunity to follow his dream in 1965 when his older brother Arthur pulled out of a play and volunteered David to takeover the role.
- Is a patron of The Shark Trust, a charity which works to advance the conservation of sharks.
- Was made an Officer of the Order of the British Empire (OBE) in 1993, and knighted in 2005, both for services to drama.
- His experience of nursing his partner Myfanwy Talog through breast cancer inspired him to create The David Jason Trust for terminally ill children.
- Is an Honorary Vice Patron of the Royal International Air Tattoo.
- Qualified as a helicopter pilot.