Cameo

Cameo, originally meaning “a small piece of artwork,” refers to a bit part (usually a brief, non-speaking, or walk-on role that is uncredited or unbilled). A cameo consists of a special screen appearance by a famous actor, director, or prominent person.

Cameo is in contrast to a bit part.

Cameo also refers to a type of camera shot where the subject is filmed against a black or neutral background.