Thomas Boone Quaid is the son of actor Dennis Quaid and Kimberly Buffington. He was born on November 8, 2007, and he has a twin sister named Zoe Grace Quaid. He is also the younger half-brother of actor Jack Quaid.
Most people first hear about Thomas because of his famous father. His own story is different from a typical celebrity kid profile, though. He survived a frightening hospital mistake as a newborn, and today he is reported to be a business student at the University of Colorado Boulder.
Who Is Thomas Boone Quaid?
Thomas is one of two children Dennis Quaid has with Kimberly Buffington. His father is known for movies like The Parent Trap, The Rookie, and The Day After Tomorrow. His half-brother Jack stars in The Boys and has appeared in Scream and Oppenheimer.
Thomas has taken a quieter path. He has no publicly documented acting credits, and he rarely shares details about his life. What the public knows comes mostly from his parents’ statements and news reports about the family.
Thomas Boone Quaid Quick Facts
| Detail | Information |
|---|---|
| Full name | Thomas Boone Quaid |
| Date of birth | November 8, 2007 |
| Age | 19 (as of November 11, 2026) |
| Birthplace | Santa Monica, California |
| Father | Dennis Quaid |
| Mother | Kimberly Buffington |
| Twin sister | Zoe Grace Quaid |
| Half-brother | Jack Quaid |
| College | University of Colorado Boulder |
| Reported field of study | Business |
How Old Is Thomas Boone Quaid?
Thomas turned 19 on November 8, 2026. He was born in Santa Monica, California, in 2007. His twin sister, Zoe, was born two minutes after him on the same day.
The twins were born through a gestational carrier. Dennis Quaid and Kimberly Buffington are their biological parents. The twins joined a family that already included Dennis’s older son, Jack.
Who Are Thomas Boone Quaid’s Parents?
Thomas’s parents are Dennis Quaid and Kimberly Buffington. They married in 2004, and their divorce was finalized in 2018.
Dennis Quaid
Dennis Quaid is an American actor with a long career in film and television. Besides the movies mentioned above, he is known for The Right Stuff and Far from Heaven. He also has an older son, Jack, from his marriage to actress Meg Ryan.
Dennis became a public voice on hospital safety after the twins’ medical emergency. He spoke to Congress about the problem in 2008.
Kimberly Buffington
Kimberly Buffington stays out of the spotlight much more than her ex-husband does. Kimberly was part of the family’s public response to the medication error, although she was not present at the 2008 congressional hearing. Little else about her private life is shared publicly.
Does Thomas Boone Quaid Have a Twin Sister?
Yes. His twin sister is Zoe Grace Quaid. Both were born on November 8, 2007, through a gestational carrier in Santa Monica, California. Thomas arrived first at 8:26 a.m., weighing 6 pounds, 12 ounces. Zoe followed two minutes later at 8:28 a.m., weighing 5 pounds, 9 ounces.
Like Thomas, Zoe keeps a low profile. The twins reportedly chose different colleges. Thomas is at the University of Colorado Boulder, and Zoe is said to be at the University of Virginia, where she also studies business.
Is Jack Quaid Thomas Boone Quaid’s Brother?
Yes, but they are half-brothers. They share a father, Dennis Quaid, but have different mothers. Jack’s mother is Meg Ryan, and Thomas’s mother is Kimberly Buffington.
Jack was born in 1992, so he is about 15 years older than Thomas. He studied at New York University’s Tisch School of the Arts before building his acting career. Thomas has not announced any plans to work in entertainment.
What Happened to Thomas Boone Quaid as a Baby?
In 2007, just days after birth, Thomas and Zoe were treated at Cedars-Sinai Medical Center in Los Angeles for staph infections. During their hospital stay, staff mistakenly administered adult-strength heparin to both babies instead of the low-dose Hep-Lock they were supposed to receive. The overdose happened twice within about eight hours.
What Is Heparin?
Heparin helps stop blood from clotting. Hospitals use a weak version, sold as Hep-Lock, to keep IV lines from clogging in tiny patients. The twins were supposed to get a 10-unit dose of the weak version.
Instead, they were given a 10,000-unit dose of the strong version. According to Dennis Quaid’s testimony before the U.S. House of Representatives, that was 1,000 times the intended amount.
How Did the Mistake Happen?
The two heparin products came in vials that looked very much alike. The labels were similar, and the bottles were close in size. In the hearing, the Quaids explained that this made a mix-up easy.
The babies received the wrong dose twice within about eight hours. Because heparin keeps blood from clotting, an overdose can cause dangerous bleeding.
Did Thomas and Zoe Survive?
Yes. Doctors gave the twins medicine called protamine to reverse the effects of heparin and watched their blood closely. Their clotting levels took more than 40 hours to return to a measurable range. Both babies survived, recovered, and went home from the hospital.
The twins had also been born about four weeks premature. Their parents told Congress that the babies appeared to have no lasting damage at the time, although they could not know what effects might appear later.
How Did the Incident Lead to Patient Safety Advocacy?
On May 14, 2008, Dennis Quaid appeared before the U.S. House Committee on Oversight and Government Reform. He described the medication error involving his newborn twins and raised concerns about similar drug labels and hospital safety. Kimberly was not present at the hearing, but she was part of the family’s public response to the incident.
Dennis also pointed to an earlier case in Indianapolis, where heparin errors killed three infants. Later, he started The Quaid Foundation to promote patient safety. You can read the full hearing record on GovInfo.
Where Does Thomas Boone Quaid Go to College?
Thomas attends the University of Colorado Boulder, according to a 2026 interview Dennis gave to PEOPLE. He is reported to study business, just like his sister. Dennis talked about dropping off his twins at school and how fast the years went by.
No reliable source shares Thomas’s exact major, his grades, or his career goals. For now, “business student” is the most accurate way to describe him. PEOPLE has more on the family in its report on Dennis Quaid’s kids.
Is Thomas Boone Quaid an Actor?
No public record shows Thomas working as an actor. That surprises some people because acting runs in his family. His father and half-brother both work in film and television.
Thomas has not announced plans to join them. He may change course someday, but nothing confirmed points that way right now.
What Else Is Known About His Personal Life?
Very little. Thomas does not share much about his hobbies, friends, or dating life, and his family has also kept those details private. Anything beyond college and family is guesswork.
Is Thomas Boone Quaid on Instagram?
No official account has been confirmed. Several fan pages and lookalike profiles use the Quaid name, so be careful before trusting one.
What Is Thomas Boone Quaid’s Net Worth?
His net worth has not been verified. Dennis Quaid’s wealth does not belong to Thomas, and there is no record of Thomas earning a notable income. Sites that list an exact number for him rarely show where it came from.
Thomas Boone Quaid FAQs
How old is Thomas Boone Quaid?
He was born on November 8, 2007, and turned 19 in November 2026.
Who is Thomas Boone Quaid’s twin?
His twin sister is Zoe Grace Quaid. She was born two minutes after him.
Where does Thomas Boone Quaid go to school?
He attends the University of Colorado Boulder and is reported to study business.
What happened to Thomas Boone Quaid as a newborn?
He and Zoe received a heparin overdose at a Los Angeles hospital in 2007. Both survived.
Is Thomas Boone Quaid an actor?
No public acting credits have been documented for him.
What is Thomas Boone Quaid’s height?
No reliable source has confirmed it.
Does Thomas Boone Quaid have a girlfriend?
Nothing about his dating life has been confirmed publicly.
Final Thoughts
Thomas Boone Quaid grew up in a famous family, yet his own story is about more than his last name. He and his twin survived a dangerous medication error, and that event pushed their parents to speak up for safer hospitals. Today he appears to be living a quiet student life in Colorado.
Much about him remains private, and that is likely how he prefers it. Details such as his age and school are current as of November 2026, so check for updates before relying on them later.
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Hi, I’m Sophia Turner, a content writer who focuses on celebrity biographies, net worth information, and entertainment topics. I enjoy researching public figures and using reliable sources to make complex or unfamiliar information easy to understand.
My goal is to create clear and useful articles about celebrities, including their careers, achievements, backgrounds, and public work. I also follow entertainment news and trends to keep the content relevant and interesting for readers.