Justin Henry (born May 25, 1971) is an American actor and businessman, known for playing Billy Kramer in the 1979 film Kramer vs. Kramer, a debut role which earned him an Academy Award for Best Supporting Actor nomination at just eight years old. , he remains the youngest Oscar nominee in any category. The performance later earned him a spot (No. 80) on VH1's list of 100 Greatest Kid Stars. Most of his film and television credits came as a child or teenager, although he has continued acting as an adult.
His next role was in a 1983 episode of the American television series Fantasy Island. On the big screen, Henry appeared in the Brat Pack film Sixteen Candles (1984), as Mike, one of main character Samantha's siblings. Henry also played the son of a married couple played by Don Johnson and Susan Sarandon in the film Sweet Hearts Dance (1988). In this role, critic Janet Maslin called him a "large and amusingly sullen teenager".
After graduation, Henry's next widely seen performance was in 1997, as a medical student in a two-episode role during the fourth season of ER. He starred opposite Ally Sheedy, Jason David Frank and Brian O'Halloran in the mockumentary The Junior Defenders, which was filmed that same year but released direct-to-video in 2007.
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| 1979 | Kramer vs. Kramer | Billy Kramer | |
| 1983 | Tiger Town | Alex | |
| 1984 | Sixteen Candles | Mike Baker | |
| 1985 | Martin's Day | Martin | |
| Double Negative | |||
| 1988 | Sweet Hearts Dance | Kyle Boon | |
| 1996 | Andersonville | Tyce | |
| 1997 | ER | Med Student James Sasser | Season 4 Episodes 4 and 5 |
| 2003 | My Dinner with Jimi | Howard Kaylan | |
| Finding Home | Prescott | ||
| 2004 | Lost | Chester Gould | |
| 2007 | The Junior Defenders | Jimmy Fletcher | |
| 2008 | My Own Worst Enemy | Dr. Rafe Castle | Season 1 Episode 2 |
| 2010 | Brothers & Sisters | Dr. Lewis | Season 4 Episode 21 |
| 2014 | Reaper | Caine | |
| 2019 | On Cinema | Himself | "The New On Cinema Oscar Special" special |
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