Thomas Boone Quaid: Dennis Quaid’s Son Bio (2026)
Thomas Boone Quaid is the son of Hollywood actor Dennis Quaid, but his life story began with headlines of its own. Born on November 8, 2007, in Santa Monica, California, Thomas entered the world alongside his twin sister, Zoe Grace Quaid, after his parents chose gestational surrogacy to grow their family.
Just weeks into his life, he became the centre of a national medical story when he and his newborn sister survived a dangerous hospital medication error. Since then, his parents have worked hard to keep both twins out of the spotlight, which is why Thomas has grown up far more quietly than most celebrity children. This profile brings together everything that is publicly known about him: his birth, his family, the 2007 incident that changed his parents’ lives, his ethnic background, and where he stands today.
| Fact | Details |
|---|---|
| Full name | Thomas Boone Quaid |
| Known for | Son of actor Dennis Quaid; surviving a widely reported newborn heparin overdose in 2007 |
| Spouse–Ex | None — not married |
| Ethnicity–Nationality | American; mixed European descent (English, Scottish, Scots-Irish, Irish and German heritage on his father’s side) |
| Children | None |
Who Is Thomas Boone Quaid?
Thomas Boone Quaid is the younger twin son of actor Dennis Quaid and his third wife, real estate agent Kimberly Buffington. He is one of three children of the veteran Hollywood star, alongside his twin sister Zoe Grace Quaid and his much older half-brother, actor Jack Quaid, who was born to Dennis and actress Meg Ryan in 1992.
Unlike his father, his half-brother and his uncle Randy Quaid — all working actors — Thomas has never pursued a public career. His public identity is tied to two things: his famous surname and the dramatic medical emergency that marked his first weeks of life, an episode that made his family a national symbol in the patient-safety movement. Because Dennis and Kimberly chose to raise the twins largely away from cameras, he remains one of Hollywood’s most private celebrity children, with very little verified information about his daily life beyond what his father has shared in interviews.
Early Life and Background
Thomas Boone Quaid was born on November 8, 2007, in Santa Monica, California, delivered by a gestational surrogate. He arrived first at 8:26 a.m., weighing 6 pounds 12 ounces, and his twin sister Zoe Grace followed just two minutes later at 5 pounds 9 ounces. The twins were the biological children of Dennis Quaid and Kimberly Buffington, and their birth was announced as a joyful milestone for the couple, who had married three years earlier.
The joy turned to fear roughly ten days later. Both newborns developed staph infections and were admitted to Cedars-Sinai Medical Center in Los Angeles. While being treated, Thomas and Zoe were accidentally given 10,000 units of the blood thinner heparin instead of the intended 10 units — one thousand times the prescribed dose. The massive overdose put both infants in critical condition, and Dennis and Kimberly reportedly learned of the error only the morning after it happened.
Fortunately, by early December 2007, both babies had made a full recovery and were discharged from the hospital. The ordeal became one of the most widely covered newborn medical incidents of the decade, and it spurred Dennis Quaid to become a prominent advocate for hospital safety. He established The Quaid Foundation to raise awareness about preventable medical errors, and the family later pursued legal action against the hospital and the drug’s manufacturer, reportedly reaching a settlement. The episode left the family with what Dennis later described as a much deeper appreciation for everyday fatherhood.
Relationship with Dennis Quaid
Dennis William Quaid, Thomas’s father, is an American actor born April 9, 1954, in Houston, Texas. Over a career spanning more than four decades, he has starred in films including Breaking Away, The Right Stuff, The Parent Trap, Frequency, The Rookie, The Day After Tomorrow and Far from Heaven, and he also performs with his band, the Sharks. You can read more about his career and background on Dennis Quaid‘s profile.
Dennis married Thomas’s mother, Kimberly Buffington, on July 4, 2004, at his ranch in Paradise Valley, Montana. Buffington, a real estate professional from Austin, Texas, was the actor’s third wife. Their marriage produced the twins in 2007, but the relationship faced repeated strain: Buffington filed for divorce in March 2012 and then withdrew the petition; the couple separated again, with Dennis filing in late 2012, before reconciling in 2013. In June 2016 she filed once more, and the divorce was finalized in April 2018, with shared custody arrangements for the twins. In June 2020, Dennis married his fourth wife, CPA and yoga instructor Laura Savoie, in Santa Barbara.
Despite the marital turbulence, Dennis has spoken warmly and often about fatherhood. In a 2018 interview, he described his favourite time with the twins as the morning school run, saying he bonded with them over breakfast and the drive to school. Thomas and Zoe also share a close connection with their half-brother Jack Quaid, the Hunger Games and The Boys star, who has occasionally included his younger siblings in social media posts — one of the few public glimpses of Thomas Boone Quaid as a teenager.
Ethnicity and Nationality
Thomas Boone Quaid is an American citizen, born in California to parents with deep American roots. His ethnic background is best described as mixed European descent, drawn mainly from what is publicly documented about his father’s ancestry.
Dennis Quaid is of English, Scottish, Scots-Irish (Northern Irish), Irish and German ancestry, according to genealogical research. In a 2002 interview on Inside the Actors Studio, Dennis also stated that he has Irish and Cajun (French) ancestry. There are additionally unverified claims of partial Choctaw Native American lineage on his father’s side, though the evidence for that connection is considered unclear. The Quaid paternal line itself has been traced to County Limerick, Ireland.
His mother, Kimberly Buffington, is an American real estate agent from Texas whose own ethnic background has not been publicly documented. In media coverage, he is generally described as white or Caucasian of European descent, reflecting the well-documented mixed European heritage on his father’s side of the family.
Personal Life: Where Is Thomas Boone Quaid Now?
As of 2026, Thomas Boone Quaid is 18 years old and will turn 19 on November 8, 2026. True to the pattern his parents set from his birth, he continues to live outside the public eye. He has no known public social media presence, has not pursued acting, and no verified details about his schooling, hobbies or personal relationships have been published. Both of his parents have consistently shielded the twins from publicity, and Dennis has described a deliberately normal family routine built around school, meals and conversation.
The rare public updates about the twins tend to come through their father’s interviews. In the summer of 2025, Dennis told reporters that his daughter Zoe was working as a camp counselor in Texas — a detail he shared while discussing deadly flash flooding near her camp — but he has offered no comparable public update about Thomas’s own activities. What is clear is that Thomas has grown into young adulthood as a healthy, private young man, far removed from the glare that defined his first weeks of life. In this he is much like other private celebrity-family figures we profile, from Jalynn Elordi to Anne Steves and Marilyn Kroc Barg — people whose names are known, but whose lives remain their own.
Frequently Asked Questions
Who are Thomas Boone Quaid’s parents?
His father is actor Dennis Quaid, and his mother is Kimberly Buffington, a Texas real estate agent who was Dennis Quaid’s third wife from 2004 until their divorce was finalized in 2018.
How old is Thomas Boone Quaid?
Thomas Boone Quaid was born on November 8, 2007, which makes him 18 years old as of 2026. He will turn 19 on November 8, 2026.
Does Thomas Boone Quaid have siblings?
Yes. His twin sister is Zoe Grace Quaid, born two minutes after him. He also has an older half-brother, actor Jack Quaid (born 1992), from his father Dennis Quaid’s marriage to actress Meg Ryan.
What happened to Thomas Boone Quaid as a newborn?
About ten days after his birth, Thomas and his twin sister were hospitalized at Cedars-Sinai Medical Center in Los Angeles with staph infections. There they were accidentally given 10,000 units of the blood thinner heparin instead of 10 units — a thousand times the intended dose. Both infants were critically ill but made a full recovery. The incident led Dennis Quaid to found The Quaid Foundation to promote hospital patient safety.
Is Thomas Boone Quaid an actor?
No. Unlike his father, his half-brother Jack and his uncle Randy Quaid, he has not pursued acting or any public career. He has been raised largely out of the spotlight, and very little is publicly known about his personal life.
Thomas Boone Quaid’s story begins with one of the most dramatic newborn medical emergencies ever to involve a Hollywood family — and it is remarkable precisely because what followed was normal. He grew up healthy, private and far from the cameras, the way his parents intended. For a celebrity child whose first headlines were written in a hospital ward, that quiet is perhaps the happiest ending of all.
She holds advanced qualifications in Sociology, Anthropology, and Ethnic Studies, fields that focus on human cultures, traditions, migration patterns, and identity development across the world. Her expertise allows her to break down complex cultural topics into easy-to-understand articles that readers genuinely enjoy.
Over the years, Milana has researched hundreds of public figures, communities, and global ethnic groups, making her a trusted voice in the ethnicity niche. Her writing combines factual research, historical understanding, and modern cultural analysis to ensure every article is informative, reliable, and reader-friendly.
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Milana’s goal is to provide readers with authentic, well-researched, and trustworthy information while celebrating the diversity of cultures around the world. Through her detailed research and passion for cultural education, she continues to help audiences better understand ethnicity, heritage, and identity in today’s connected world.
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