Only When I Larf is a 1968 English-language Comedy Crime film written by John Salmon, Patrick Tilley and Len Deighton. The movie is directed by Basil Dearden and produced by Len Deighton and Brian Duffy. A master conman leads a pair of British accomplices on an international adventure of highly profitable dirty tricks. Only when i larf features Richard Attenborough in the title role along with an ensemble cast including David Hemmings, Alexandra Stewart, Nicholas Pennell, Melissa Stribling, Terence Alexander and Edric Connor. The screenplay is written by John Salmon which is inspired from Only When I Larf by Len Deighton. The music was composed by Ron Grainer. Cinematography was done by Anthony B. Richmond and editing by Fergus McDonell. The film has a running time of 104 minutes. It was released on 23rd October 1968. The movie made a box office gross of $25 million. Distribution rights for the movie were acquired by Paramount British Pictures.