Megan BullThomas Boone Quaid is one of the more talked-about “celebrity kids” on the internet, yet one of the least documented.
He is the son of veteran Hollywood actor Dennis Quaid, but unlike his older half-brother Jack Quaid — a working actor known for The Boys and Oppenheimer — Thomas has never pursued a public career of his own.
Most of what circulates about him online traces back to a small set of verified facts: his birth, his twin sister, a serious hospital incident he survived as an infant, and his family tree. This article sticks to that verifiable record rather than speculating about details his family has chosen to keep private.
Who Is Thomas Boone Quaid?
Thomas Boone Quaid was born on November 8, 2007, in Santa Monica, California, to actor Dennis Quaid and his then-wife, real estate broker Kimberly Buffington. He arrived via a gestational surrogate alongside a fraternal twin sister, Zoe Grace Quaid, reportedly just minutes after her.
Outside of his family connections and one widely reported medical incident from infancy, Thomas has not built a public profile. He is not an actor, musician, or media personality, and his family has consistently kept details about his schooling, personal life, and day-to-day activities out of the press.
Family Background
Parents: Dennis Quaid and Kimberly Buffington
Dennis Quaid is a longtime American actor whose film career spans several decades, with credits in movies ranging from sports dramas to disaster films.
Kimberly Buffington built her own career in luxury real estate rather than entertainment. The couple married in 2004 and welcomed the twins in 2007 after reportedly facing fertility challenges. Dennis Quaid and Kimberly Buffington finalized their divorce in April 2018. Dennis later remarried, to Laura Savoie, in 2020.
Twin Sister: Zoe Grace Quaid
Zoe Grace Quaid is Thomas’s fraternal twin, born the same day in Santa Monica. Like her brother, she has largely stayed out of the public eye, and detailed information about her adult life is not publicly available.
Half-Brother: Jack Quaid
Thomas has an older half-brother, actor Jack Quaid, born in 1992 to Dennis Quaid and actress Meg Ryan. Jack Quaid built a substantial acting career, with roles including a supporting part in The Hunger Games, a lead role in Amazon’s The Boys, and an appearance in Oppenheimer.
There is roughly a fifteen-year age gap between the two brothers, and, based on available public information, Thomas has not followed his half-brother into the entertainment industry.
The 2007 Hospital Incident
The most significant event tied to Thomas Boone Quaid’s public profile happened when he was just eleven days old. He and his twin sister were being treated at Cedars-Sinai Medical Center in Los Angeles for a staph infection when hospital staff mistakenly administered them an adult-strength dose of the blood-thinning drug heparin — roughly 1,000 times the intended infant dose.
The twins survived the overdose, and the case drew national media attention at the time, in part because similar dosing errors were reported to have affected other infants at hospitals elsewhere in the country around the same period.
Dennis Quaid has spoken publicly and repeatedly about the incident in the years since, using his platform to advocate for stronger medication-safety protocols in hospitals. He has described the experience as a turning point that pushed him toward patient-safety activism, including work with organizations focused on reducing preventable medical errors. For Thomas, the event remains an inseparable part of his early biography, even though he was an infant and has no personal memory of it.
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Growing Up Away From the Spotlight
Since the heparin incident, Thomas Boone Quaid’s life has been notably low-profile. His parents have not shared meaningful details about his schooling, hobbies, friendships, or career interests, and there is no public record confirming any professional or entertainment pursuits on his part. Coverage of him online largely recycles the same handful of confirmed facts — his birth date, his twin sister, his famous father, and the 2007 hospital story — rather than offering new reporting.
This is a deliberate contrast with his half-brother’s path. Jack Quaid has been open about his acting career and has given numerous interviews discussing his work and his family. Thomas, by comparison, appears to have been raised with an emphasis on privacy, a choice that is common among children of celebrities whose parents want to shield them from tabloid attention during childhood and adolescence.
Age and Key Facts at a Glance
| Detail | Information |
|---|---|
| Full name | Thomas Boone Quaid |
| Born | November 8, 2007, Santa Monica, California |
| Father | Dennis Quaid |
| Mother | Kimberly Buffington |
| Twin sister | Zoe Grace Quaid |
| Half-brother | Jack Quaid (b. 1992) |
| Notable public event | Survived a 2007 heparin overdose at Cedars-Sinai Medical Center |
| Public career | None confirmed as of this writing |
Frequently Asked Questions
How old is Thomas Boone Quaid? He was born on November 8, 2007, making him an adult as of late 2025 and 18 years old for most of 2026, with his 19th birthday falling in November 2026.
Does Thomas Boone Quaid have a twin? Yes. His fraternal twin sister is Zoe Grace Quaid, born the same day.
Is Thomas Boone Quaid an actor? There is no public record of Thomas pursuing an acting career. This distinguishes him from his older half-brother, Jack Quaid, who is a working actor.
What happened to Thomas Boone Quaid as a baby? At eleven days old, he and his twin sister were mistakenly given an adult-strength dose of the blood thinner heparin at Cedars-Sinai Medical Center. Both twins survived, and the incident later became part of Dennis Quaid’s public advocacy for hospital medication safety.
Are Dennis Quaid and Kimberly Buffington still married? No. The couple divorced, with the divorce finalized in April 2018.
