Mia and Roman is a 1968 23-minute documentary film

Documentary film

Documentary films constitute a broad category of nonfictional motion pictures intended to document some aspect of reality, primarily for the purposes of instruction or maintaining a historical record...

 which was shot during the making of Rosemary's Baby

Rosemary's Baby

Rosemary's Baby is a 1967 best-selling horror novel by Ira Levin, his second published book. Major elements of the story were inspired by the publicity surrounding the Church of Satan of Anton LaVey which had been founded in 1966.-Plot summary:...

. The title refers to Mia Farrow

Mia Farrow

Mia Farrow is an American actress, singer, humanitarian, and fashion model.Farrow first gained wide acclaim for her role as Allison Mackenzie in the soap opera Peyton Place, and for her subsequent short-lived marriage to Frank Sinatra...

 and Roman Polanski

Roman Polanski

Roman Polanski is a French-Polish film director, producer, writer and actor. Having made films in Poland, Britain, France and the USA, he is considered one of the few "truly international filmmakers."...

.

The film features footage of Roman Polanski directing the film's cast on set. It was directed by Shahrokh Hatami.

It was screened as a promo film at Hollywood's Lytton Center, and later included as a featurette

Featurette

Featurette is a term used in the American film industry to designate a film whose length is approximately three quarters of a reel, or about 20–44 minutes in running time - thus midway between a short subject and a feature film; thus it is a "small feature"...

on the DVD of Rosemary's Baby.

It is described as a "trippy on-set featurette" and "an odd little bit of cheese".