A Cock and Bull Story (released in the United States and Australia as Tristram Shandy: A Cock and Bull Story) is a 2006 British comedy directed by Michael Winterbottom. It is a film-within-a-film, featuring Steve Coogan and Rob Brydon playing themselves as egotistical actors during the making in a screen adaptation of Laurence Sterne's 18th century novel Tristram Shandy. Gillian Anderson and Keeley Hawes also play themselves in addition to their Tristram Shandy roles.

The film was the last in a long working relationship between Winterbottom and screenwriter Frank Cottrell-Boyce. After some dispute, Boyce decided to take his name off the script, instead using the pseudonym 'Martin Hardy'.

Two actors, as their make up is applied, talk about the size of their parts. Then into the film: Laurence Sterne's unfilmable novel, Tristram Shandy, a fictive autobiography wherein the narrator, interrupted constantly, takes the entire story to be born. The film tracks between "Shandy" and behind the scenes. Size matters: parts, egos, shoes, noses. The lead's girlfriend, with their infant son, is up from London for the night, wanting sex; interruptions are constant. Scenes are shot, re-shot, and discarded. The purpose of the project is elusive. Fathers and sons; men and women; cocks and bulls. Life is amorphous, too full and too rich to be captured in one narrative. Written by