Took surname as a tribute to jazz saxophonist John Coltrane.
Became a household name in England with his TV series Cracker, which began in 1993; played hard-drinking criminal psychologist Eddie Fitzgerald.
As a result of his work on Cracker, won the role of a Russian mobster in the 1995 James Bond film GoldenEye.
Took the role of Hagrid in the Harry Potter film series at the urging of his children.
Awarded the OBE (Officer of the Order of the British Empire) in January 2006.
That same year, came in sixth in a poll of the most famous Scots; the Loch Ness Monster came in first.
A collector and restorer of vintage cars, in 2011 donated his 1988 Chrysler Jeep to the Riverside Museum of Transport in Glasgow, and was a trustee for the Riverside Museum Appeal, which raised money for the development of the facility.
1992, Genie Awards — Best Performance by an Actor in a Supporting Role: Nominee
2017, BAFTA Television Awards — Best Actor: Nominee
2002, BAFTA Film Awards — Best Actor in a Supporting Role: Nominee