Parenthood is a 1989 comedy-drama film with an ensemble cast that includes Steve Martin

Steve Martin

Stephen Glenn "Steve" Martin is an American actor, comedian, writer, playwright, producer, musician and composer....

, Dianne Wiest

Dianne Wiest

Dianne Wiest is an American actress. She has had a successful career on stage, television, and film, and has won two Academy Awards, two Emmy Awards and a Golden Globe Award. Wiest has also been nominated for a BAFTA Award.-Early life:...

, Mary Steenburgen

Mary Steenburgen

Mary Nell Steenburgen is an American actress. She is best known for playing the role of Lynda Dummar in Jonathan Demme's Melvin and Howard, which earned her an Academy Award and a Golden Globe.-Early life:...

, Jason Robards

Jason Robards

Jason Nelson Robards, Jr. was an American actor on stage, and in film and television, and a winner of the Tony Award , two Academy Awards and the Emmy Award...

, Rick Moranis

Rick Moranis

Frederick Allan "Rick" Moranis is a Canadian comedian, actor, musician, and a magician. Moranis came to prominence in the late 1970s on the sketch comedy show Second City Television, and later appeared in several Hollywood films including Strange Brew; Ghostbusters; Spaceballs; Little Shop of...

, Tom Hulce

Tom Hulce

Thomas Edward "Tom" Hulce is an American actor and theater producer. As an actor, he is perhaps best known for his Oscar-nominated portrayal of Mozart in the movie Amadeus and his role as "Pinto" in National Lampoon's Animal House. Additional acting awards included a total of four Golden Globe...

, Martha Plimpton

Martha Plimpton

Martha Campbell Plimpton is an American actress and singer and former model. Plimpton is a screen, stage and television actress. She first appeared as Jonsy in the feature film River Rats before rising to prominence in the Richard Donner film The Goonies portraying the character Stef...

, Keanu Reeves

Keanu Reeves

Keanu Charles Reeves is a Canadian actor. Reeves is perhaps best known for his roles in Bill & Ted's Excellent Adventure, Speed, Point Break and the science fiction-action trilogy The Matrix...

, Harley Kozak

Harley Jane Kozak

-Life and career:Kozak was born Susan Jane Kozak in Wilkes-Barre, Pennsylvania, the daughter of Dorothy , a university music teacher, and Joseph Aloysius Kozak, an attorney. She has seven siblings: brothers John, Joseph, Peter and Andrew and sisters Dorothy, Mary and Ann. Harley is the youngest of...

, Eileen Ryan

Eileen Ryan

Eileen Ryan is an American actress who has appeared in a number of movies and TV series. She is the widow of actor and director, Leo Penn, and mother of singer, Michael Penn, and actors, Sean and, Chris Penn, who died in January 2006....

, Joaquin Phoenix

Joaquin Phoenix

Joaquin Rafael Phoenix , formerly credited as Leaf Phoenix, is an American film actor. He was born in San Juan, Puerto Rico, and his family returned to the continental United States four years later...

 (credited as Leaf Phoenix) and Dennis Dugan

Dennis Dugan

Dennis Dugan is an American director, comedian, and actor. He is most famous for his partnership with comedic actor Adam Sandler, with whom he directed the films Happy Gilmore, Big Daddy, I Now Pronounce You Chuck and Larry, You Don't Mess with the Zohan, Grown Ups, Just Go With It, and Jack and...

.

The film was directed by Ron Howard

Ron Howard

Ronald William "Ron" Howard is an American actor, director, and producer. He came to prominence as a child actor, playing Opie Taylor in the sitcom The Andy Griffith Show for eight years, and later the teenaged Richie Cunningham in the sitcom Happy Days for six years...

, who assisted in developing the story with screenwriters Lowell Ganz

Lowell Ganz

Lowell Ganz is an American screenwriter, television writer, and television producer. He is the long-time writing partner of Babaloo Mandel.-Life and career:...

 & Babaloo Mandel

Babaloo Mandel

Marc "Babaloo" Mandel is an American writer. His writing credits include the television series Happy Days and the movie Night Shift. He is the long-time writing partner of Lowell Ganz. Mandel was born in New York City, the son of a taxi driver...

. Much of the film is based on the family and parenting experiences of Howard, Ganz, Mandel, and producer Brian Grazer

Brian Grazer

Brian Thomas Grazer is an Academy Award-winning American film and television producer who co-founded Imagine Entertainment in 1986 with Ron Howard. Together they have produced many acclaimed films, including Apollo 13 and A Beautiful Mind .- Career :Brian Grazer began his career as a producer...

, who have at least 14 children among the four of them.