Top 10 Former Child Stars

10. Ivana Baquero in Pan’s Labyrinth (Guillermo del Toro, 2006)
Ivana Baquero Macías is a Spanish actress. At the age of 11, Baquero was chosen by director Guillermo del Toro to play the lead role of Ofelia in Pan's Labyrinth, for which she won critical acclaim and the Goya Award for Best New Actress.
Pan's Labyrinth is a 2006 Mexican-Spanish dark fantasy film written and directed by Guillermo del Toro. It was produced and distributed by Esperanto Films.

9. Henry Thomas in E.T.: The Extra-Terrestrial (Steven Spielberg, 1982)
Henry Jackson Thomas, Jr. is an American actor and musician. He has appeared in over 40 films and is best known for his role as Elliott Taylor in Steven Spielberg's E.T. the Extra-Terrestrial, Cloak
E.T. the Extra-Terrestrial (often referred to simply as E.T.) is a 1982 American science fiction film coproduced and directed by Steven Spielberg

8. Jean-Pierre Léaud  in The 400 Blows (François Truffaut, 1959)
Jean-Pierre Léaud is a French actor.
The 400 Blows is a 1959 French drama film directed by François Truffaut and starring Jean-Pierre Léaud, Albert Rémy, and Claire Maurier. One of the defining films of the French New Wave, it displays many of the characteristic traits of the movement.

7. Lina Leandersson  in Let the Right One In (Tomas Alfredson, 2008)
Lina Leandersson is a Swedish actress. She played the lead role of Eli in the 2008 Swedish romantic vampire film Let the Right One In, based on the novel by the same name. Born in Falun, Leandersson started performing at an early age.
A fragile, anxious boy, 12-year-old Oskar is regularly bullied by his stronger classmates but never strikes back. The lonely boy's wish for a friend seems to come true when he meets Eli, also 12, who moves in next door to him with her father. A pale, serious young girl, she only comes out at night and doesn't seem affected by the freezing temperatures.

6. Zoe Heran  in Tomboy (Céline Sciamma, 2011)

5. Ana Torrent in Cria Cuervos (Carlos Saura, 1976)
Ana Torrent Bertrán de Lis is a Spanish film actress. Her debut came in 1973 with the starring role as "Ana" in the film El espíritu de la colmena directed by Víctor Erice, when she was seven years old.
Cría Cuervos is a 1976 Spanish drama film directed by Carlos Saura. The film is an allegorical drama about an eight-year-old girl dealing with loss. Highly acclaimed, it received the Special Jury Prize Award at the 1976 Cannes Film Festival.

4. Linda Blair in The Exorcist (William Friedkin, 1973)
Linda Denise Blair is an American actress. Blair is best known for her role as the possessed child, Regan, in the film The Exorcist, for which she was nominated for an Academy Award and two Golden Globes, winning one.
When a 12-year old girl is possessed by demons, a young priest takes it upon himself to selflessly save her at the behest of her famous movie-star mother.

3. Jackie Coogan  in The Kid (Charlie Chaplin, 1921)
John Leslie "Jackie" Coogan was an American actor who began his movie career as a child actor in silent films. Many years later, he became known as Uncle Fester on the 1960s sitcom The Addams Family.
Disney's The Kid is a 2000 American film, directed by Jon Turteltaub and starring Bruce Willis and Spencer Breslin. It co-stars Emily Mortimer, Lily Tomlin, Chi McBride, and Jean Smart.

2. Natalie Portman in Leon (Luc Besson, 1994)
Natalie Portman is an actress with dual American and Israeli citizenship. Her first role was as an orphan taken in by a hitman in the 1994 action film Léon: The Professional, but mainstream success
A corrupt Drug Enforcement Administration boss and his thugs murder Natalie's family in a drug deal gone awry. Orphaned by the massacre, Natalie is forced to take shelter in the apartment of a neighbor, Leon, whom she knows only slightly. He's a loner and first generation immigrant

1. Nina Kervel-Bey in Blame it on Fidel (Julie Gavras, 2006)
Blame it on Fidel is a 2006 French drama film directed by Julie Gavras.

Source: http://grolschfilmworks.com/ca/features/child-performances