G
- Johnny Galecki (born 1975)
- A Night in the Life of Jimmy Reardon (1988)
- Prancer (1989)
- National Lampoon's Christmas Vacation (1989)
- Roseanne (1992–1997)
- David Gallagher (born 1985)
- Look Who's Talking Now (1993) - as Mikey
- Phenomenon (1996)
- 7th Heaven (1996–2006)
- Angels in the Endzone (1997)
- Richie Rich's Christmas Wish (1998)
- Little Secrets (2002)
- Luis Armand Garcia (born 1992)
- ER (2000)
- George Lopez (2002–2007) - as Max
- Freddie (2006)
- Becca Gardner (born 1990)
- An Unfinished Life (2005)
- Judy Garland (1922–1969)
- Broadway Melody of 1938 (1937)
- Love Finds Andy Hardy (1938)
- The Wizard of Oz (1939) - as Dorothy Gale
- Babes in Arms (1939)
- David Geister (born 1990)
- Fight Night In The Hills (2005–2006)
- Eminem, Where Have You Been? (2009)
- Jeremy Gelbwaks (born 1961)
- The Partridge Family (1970–1971) - as Chris Partridge # 1
- Sarah Michelle Gellar (born 1977)
- Swans Crossing (1992)
- All My Children (1993–1995)
- Lisa Gerritsen (born 1957)
- Airport (1970)
- The Mary Tyler Moore Show (1970–1975)
- The War Between Men and Women (1972)
- Phyllis (1975–1977)
- Jami Gertz (born 1965)
- Endless Love (1981)
- Square Pegs (1982–1983)
- Balthazar Getty (born 1975)
- Lord of the Flies (1990)
- Young Guns II (1990)
- December (1991)
- Where the Day Takes You (1992)
- Timothy Gibbs (born 1967)
- Father Murphy (1981–1983)
- Jonathan Gilbert (born 1968)
- Little House on the Prairie (1974–1983)
- Melissa Gilbert (born 1964)
- Little House on the Prairie (1974–1983) - as Laura Ingalls
- The Miracle Worker (1980)
- Sara Gilbert (born 1975)
- Roseanne (1988–1997)
- Poison Ivy (1992)
- Dorothy Gish (1898–1968)
- An Unseen Enemy (1912)
- The Painted Lady (1912)
- The Perfidy of Mary (1913)
- Just Gold (1913)
- The Lady and the Mouse (1913)
- Red Hicks Defies the World (1913)
- Almost A Wild Man (1913)
- Her Mother's Oath (1913)
- Pa Says (1913)
- Judith of Bethulia (1914)
- Angela Goethals (born 1977)
- Benson (1993–1994)
- Phenom (1993–1994)
- Missy Gold (born 1970)
- Benson (1979–1986)
- Tracey Gold (born 1969)
- Shoot the Moon (1982)
- Growing Pains (1985–1992)
- Selena Gomez (born 1992)
- Barney & Friends (2002–2003)
- Spy Kids 3D: Game Over (2003)
- The Suite Life of Zack & Cody (2006)
- Brain Zapped (2006)
- Hannah Montana (2007)
- Wizards of Waverly Place (2007–present)
- Another Cinderella Story (2008)
- Princess Protection Program (2009)
- Wizards of Waverly Place: The Movie (2009)
- Lecy Goranson (born 1974)
- Roseanne (1988–1996)
- Joseph Gordon-Levitt (born 1981)
- Beethoven (1992)
- A River Runs Through It (1992)
- Angels in the Outfield (1994)
- Holy Matrimony (1994)
- The Juror (1996)
- 3rd Rock from the Sun (1996–2001)
- Halloween H20: 20 Years Later (1998) - as Jimmy Howell
- Mark-Paul Gosselaar (born 1974)
- Good Morning Miss Bliss (1988–1989) - as Zach Morris
- Saved by the Bell (1989–1993) - as Zach Morris
- Andre Gower (born 1973)
- The Young and the Restless (1981–1982)
- The Monster Squad (1987)
- Todd Graff (born 1959)
- The Electric Company (1975–1977) - as Jesse
- Allie Grant (born 1994)
- That's So Raven (2005)
- Weeds (2005–2006)
- The Suite Life of Zack & Cody (2006–2007)
- Ben Grauer (1908–1977)
- The Mad Woman (1919)
- His Woman (1919)
- The Idol Dancer (1920)
- Annabelle Lee (1921)
- My Friend the Devil (1922)
- Brian Austin Green (1973)
- Knots Landing (1987–1989)
- Beverly Hills, 90210 (1990–2000)
- Seth Green (born 1974)
- Billions for Boris (1984)
- The Hotel New Hampshire (1984)
- Radio Days (1987)
- Can't Buy Me Love (1988)
- Big Business (1988)
- My Stepmother Is an Alien (1988)
- It (1990)
- Lindsay and Sidney Greenbush (born 1970)
- Little House on the Prairie (1974–1982)
- Benji Gregory (born 1978)
- ALF (1986–1990)
- Jumpin' Jack Flash (1986)
- Fantastic Max (1988–1990) (voice)
- Natalie Gregory (born 1975)
- Kids Don't Tell (1985) - as Krista Mueller
- Alice in Wonderland (1985) - as Alice
- Spot Marks the X (1986) - as Kathy
- Fresno (1986) - as China Kensington
- Oliver & Company (1988) - as Jenny Foxworth (voice)
- Gordon Griffith (1907–1958)
- the Little Billy films (1914–1915)
- Kid Auto Races at Venice (1914)
- Little Sunset (1915)
- Tarzan of the Apes (1918)
- The Romance of Tarzan (1918)
- Son of Tarzan (1920)
- Huckleberry Finn (1920)
- The Adventures of Tarzan (1921)
- Camryn Grimes (born 1990)
- The Young and the Restless (1997–2005, 2006)
- Cary Guffey (born 1972)
- Close Encounters of the Third Kind (1977)
- The Sheriff and the Satellite Kid (1979)
- Everything Happens to Me
- Cross Creek (1983)
- Stroker Ace (1983)
- Chiefs (1983)
- The Bear
- Poison Ivy (1985)
- North and South (1985)
- Devon Gummersall (born 1978)
- My Girl 2 (1994)
- My So-Called Life (1994–1995)
Read more about this topic: List Of Former Child Actors From The United States