Phil McCarvill at Marie Curie Cancer Care has said that the Liverpool Care Pathway remains an "important part of good end-of-life care".
But he said that his charity is calling for a national audit in order to "ensure confidence in end-of-life care" in the UK.
More top news
Mr Farron's bizarre comment was made to an activist who came to watch the party leader speak in Cambridge on Thursday.
The US actor starred in Disney's 2004 film Miracle, chronicling the US men's hockey team at the 1980 Winter Olympics.
ITV News Economics Editor Noreena Hertz said an economic slowdown looms as a fall in retail spending led to gloomy figures.