Griffiths died on 28 March 2013 during heart surgery in Coventry, West Midlands, England, aged 65. Many reactions were posted on Twitter after his death. Some were from Daniel Radcliffe, Warwick Davis, and Richard E. Grant. His funeral took place at Holy Trinity Church in Stratford-upon-Avon, Warwickshire on 9 April 2013, with over four hundred mourners, including Daniel Radcliffe, Alan Bennett, Michael Palin, Richard E. Grant, Jack Whitehall and Judi Dench.