- Made his screen debut in the British children's TV show, Byker Grove in 1989, where he met his longtime showbiz partner Ant McPartlin.
- Released three pop-albums with McPartlin, (Psyche, Top Katz and The Cult of Ant & Dec) as the pop duo PJ & Duncan.
- Signed a 30 million pound, two-and-a-half year contract with British TV channel ITV in 2007, with McPartlin.
- Established his own production company alongside McPartlin, Mitre Television.
- Patron of The Sunshine Fund, a charity supporting disabled children.
- Appointed an Officer of the Order of the British Empire (OBE) in 2016.