Colin Firth on being an 'unlikely killer'

Actor Colin Firth has said the director of Kingsman: The Secret Service, Matthew Vaughn, cast him in the film because he was so unlikely to be seen as a 'cold killer'.

Speaking to the BBC's Andrew Marr, he said: "He cast me because he thought I was the least likely person on the planet to be doing this sort of thing".

Kingsman: The Secret Service will be released in the UK on 29 January 2015.

UK viewers can watch the Andrew Marr Show in full for 30 days.