There are also some changes to the original cast.

Malcolm in the Middle Life's Still Unfair is now available on Disney Plus. The four-part series reunites fans with the dysfunctional family 20 years later.

Malcolm has kept his distance from his family for over a decade. However, he returns when his parents insist on a 40th wedding anniversary celebration.

Who is back in the cast? Who has been replaced? Here is what you need to know.

Frankie Muniz leads the cast as Malcolm, a genius with a high IQ. He now has a daughter and runs a charity.

There are some new faces in the revival.

Muniz was a child star when the show first aired. He appeared in other shows and films like Lizzie McGuire and Agent Cody Banks.

Muniz turned to NASCAR after the show ended. He is still a professional racer. Other original actors are also returning.

Jane Kaczmarek is back as Lois, the family's temperamental matriarch. Fans wonder if she has calmed down now that her children have left.

Kaczmarek has appeared in The Simpsons and other shows since the original series.

Bryan Cranston returns as Hal, the family's loving but inept patriarch.

Cranston is known for leading Breaking Bad. He has also starred in Seinfeld and other shows.

A Disney+ subscription includes Malcolm in the Middle: Life's Still Unfair and other titles.

Christopher Masterson plays Francis, the oldest child who was sent to military school.

Masterson has been away from screens for seven years. He returns in the Malcolm In the Middle revival.

Emy Coligado is back as Piama, Francis's wife. She began her career in Sabrina the Teenage Witch.

Justin Berfield returns as Reese, the impulsive child who excels at cooking.

Berfield took a break from acting after the original series. He tried film producing and focused on family life.

Some original cast members are not returning, including Erik Per Sullivan who played Dewey.

Sullivan turned down the revival despite being offered a lot of money. He quit acting and attended Harvard University.

Most of the family is back together.

Caleb Ellsworth-Clark plays Dewey in the revival. He has appeared in Spiral and other projects.

Anthony Timpano takes over the role of Jamie, the youngest son.

Timpano's credits include Fire Country. The switch is not surprising since Jamie was a baby in the original.

Newcomers include Vaughan Murrae as Kelly, the youngest child. Kelly was mentioned in the original finale.

Keeley Karsten plays Leah, Malcolm's daughter. Kiana Madeira plays Tristan, Malcolm's girlfriend.

Malcolm in the Middle: Life's Still Unfair is streaming on Disney Plus from April 10.