The actor, who had a long career in film, television and stage, died following complications after heart surgery.
Griffiths was feted for his roles as the eccentric Uncle Monty in the cult classic Withnail and I and Hector, the unconventional teacher in Alan Bennett’s play The History Boys, winning the Laurence Olivier Award for best actor, the UK Drama Desk Award for outstanding actor in a play, the Outer Critics Circle Award for best featured actor in a play, and a Tony Award for best performance by a leading actor in a play.
He gained widespread fame as grumpy Uncle Vernon in the Harry Potter films and was much loved as disillusioned police officer and pie chef, Inspector Henry Crabbe, in the successful TV detective drama series Pie In The Sky.
Other TV credits included The Sweeney, Minder, Bird of Prey, Bergerac, A Kind of Living, Inspector Morse, The Vicar of Dibley, Hope & Glory and Episodes.
Daniel Radcliffe said, “In August 2000, before official production had even begun on Potter, we filmed a shot outside the Dursleys’, which was my first ever shot as Harry. I was nervous and he made me feel at ease.
“Seven years later we embarked on Equus together. It was my first time doing a play but, terrified as I was, his encouragement, tutelage and humour made it a joy. In fact, any room he walked into was made twice as funny and twice as clever just by his presence. I am proud to say I knew him.”