bit part

Bit Part is a 1975 Australian TV film about a struggling actor who is cast alongside Britain's most famous actor.

A bit part is a role in which there is direct interaction with the principal actors and no more than five lines of dialogue (often referred to as a "five or less" in the United States). In British television, bit parts are referred to as under sixes. An actor who regularly performs in bit roles, either as a hobby or to earn a living, is referred to as a bit player, a term also used to describe an aspiring actor who has not yet broken into major supporting or leading roles.