Firstborn is a 1984 drama

Drama

Drama is the specific mode of fiction represented in performance. The term comes from a Greek word meaning "action" , which is derived from "to do","to act" . The enactment of drama in theatre, performed by actors on a stage before an audience, presupposes collaborative modes of production and a...

 film starring Teri Garr

Teri Garr

-Early life:Garr was born in Lakewood, Ohio in 1947. Her father, Eddie Garr , was a vaudeville performer, comedian and actor whose career peaked when he briefly took over the lead role in the Broadway drama Tobacco Road...

, Peter Weller

Peter Weller

Peter Frederick Weller is an American film and stage actor, director and lecturer.He is best known for his roles as the title character in the first two RoboCop films and Buckaroo Banzai in the cult classic The Adventures of Buckaroo Banzai Across the 8th Dimension...

, Christopher Collet

Christopher Collet

Christopher Collet is an American actor who is perhaps best known for his portrayal of Jake Livingston in the 1984 movie Firstborn, and for his lead role in the 1986 film The Manhattan Project....

, Corey Haim

Corey Haim

Corey Ian Haim was a Canadian actor, known for a 1980s Hollywood career as a teen idol. He starred in a number of films such as Lucas, Silver Bullet, Murphy's Romance, License to Drive and Dream a Little Dream...

 (in his film debut), Sarah Jessica Parker

Sarah Jessica Parker

Sarah Jessica Parker is an American film, television, and theater actress and producer.She is best known for her leading role as Carrie Bradshaw on the HBO television series Sex and the City , for which she won four Golden Globe Awards, three Screen Actors Guild Awards, and two Emmy Awards...

 and Robert Downey Jr.

Robert Downey Jr.

Robert John Downey, Jr. is an American actor. Downey made his screen debut in 1970 at the age of five when he appeared in his father's film Pound, and has worked consistently in film and television ever since. During the 1980s he had roles in a series of coming of age films associated with the...

. It was filmed in New Jersey

New Jersey

New Jersey is a state in the Northeastern and Middle Atlantic regions of the United States. , its population was 8,791,894. It is bordered on the north and east by the state of New York, on the southeast and south by the Atlantic Ocean, on the west by Pennsylvania and on the southwest by Delaware...

 and New York

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

.

Plot summary

Jake Livingston (Christopher Collet) has always been the man of the Livingston home since his parents divorced, that is, until his mother (Teri Garr) started seeing Sam. Sam (Peter Weller), an alcoholic and drug addict, introduces Jake's mother into a self-destructive lifestyle.