Thomas Boone Quaid is best known as the son of Hollywood actor Dennis Quaid and one half of a set of twins who survived a terrifying medical error just weeks after birth. While his father is a famous movie star, Thomas has largely grown up away from the Hollywood spotlight, living a private life focused on family and education. He shares a close bond with his twin sister, Zoe Grace, and his older half-brother, actor Jack Quaid. This article explores the life of Thomas Boone Quaid, from his harrowing start to his current journey into adulthood.
Thomas Boone Quaid Biography
| Attribute | Details |
| Full Name | Thomas Boone Quaid |
| Date of Birth | November 8, 2007 |
| Place of Birth | Santa Monica, California |
| Age | 18 years old (as of 2026) |
| Parents | Dennis Quaid (Father) and Kimberly Buffington (Mother) |
| Siblings | Zoe Grace Quaid (twin sister), Jack Quaid (older half-brother) |
| Birth Order | Born first at 8:26 a.m. |
| Birth Weight | 6 lbs., 12 oz. |
| Education | University of Colorado Boulder (studying business) |
| Known For | Surviving a heparin overdose as an infant; being Dennis Quaid’s son |
Who Is Thomas Boone Quaid?
Thomas Boone Quaid is the 18-year-old son of renowned actor Dennis Quaid and his ex-wife, Kimberly Buffington.
Born on November 8, 2007, he and his twin sister, Zoe Grace, were welcomed into the world via a gestational surrogate. Thomas is primarily recognized as one of Dennis Quaid’s twins and has lived a life away from the constant glare of media attention. He is known for his resilience, having survived a serious medical error when he was just a newborn. Today, he is a college student beginning his independent life.
Who Are Thomas Boone Quaid’s Parents?
Thomas’s father is the legendary actor Dennis Quaid, known for his roles in films like The Parent Trap and The Day After Tomorrow, while his mother is Kimberly Buffington, a real estate agent.
Dennis and Kimberly married in 2004 and, after struggling with infertility and Kimberly suffering five miscarriages, they turned to a gestational carrier to have children. The couple welcomed Thomas and Zoe in 2007 but later separated in 2016 and finalized their divorce in 2018. Despite their separation, they have remained devoted co-parents, even reuniting amicably to celebrate their son Thomas’s high school graduation.
Thomas Boone Quaid and His Twin Sister Zoe Grace
Thomas and his twin sister, Zoe Grace Quaid, share an incredibly close bond, having been born just two minutes apart.
Zoe was born weighing 5 pounds, 9 ounces, while Thomas was the larger twin at 6 pounds, 12 ounces. The pair have shared nearly every major life milestone together, from surviving a medical crisis as infants to graduating from high school and starting college. While Thomas is attending the University of Colorado Boulder to study business, Zoe is studying business at the University of Virginia. Even as they embark on their separate college journeys, their shared history remains a defining part of their lives.
Thomas Boone Quaid’s Relationship With Jack Quaid
Thomas is the younger half-brother of Jack Quaid, the 34-year-old actor known for his roles in The Boys and Novocaine, sharing the same father, Dennis.
Despite their 15-year age gap, the half-brothers share a warm family connection, occasionally appearing together in family photos and gatherings. Jack has spoken fondly of his younger siblings, and Dennis has expressed immense pride in all his children, noting that “Jack really turned out well. I’m really proud of him, and Thomas and Zoe too”.
What Happened to Thomas Boone Quaid as a Baby?
Just days after his birth, Thomas and his twin sister were given a near-fatal overdose of the blood-thinning drug Heparin.
The twins had been admitted to Cedars-Sinai Medical Center in Los Angeles after one of them developed a staph infection. On November 18, 2007, medical staff mistakenly administered 10,000 units of Heparin, which was 1,000 times stronger than the 10-unit pediatric dose they should have received. The twins began to “bleed out” as a result of the massive overdose, and Dennis Quaid later recalled the horror of watching his son hemorrhage, with “blood squirted across the room”.
The Heparin Overdose That Changed the Quaid Family
The heparin overdose was a terrifying event that nearly cost Thomas and his sister their lives and spurred Dennis Quaid to become a patient safety advocate.
The overdose caused the infants to bleed uncontrollably from every puncture point, and they were placed in intensive care. Following the incident, Dennis and Kimberly Quaid filed a lawsuit against the drug’s manufacturer, Baxter International, arguing that the packaging for adult and pediatric doses was dangerously similar. This experience led Dennis Quaid to start a foundation dedicated to preventing medical errors, as he stated, “This mistake occurred right under our noses. It was avoidable, completely avoidable”.
How Did Thomas Boone Quaid’s Family Respond to the Medical Crisis?
The family responded with a mix of sheer terror and a fierce determination to seek justice and prevent such a tragedy from happening to others.
Dennis Quaid has spoken publicly about the incident, describing it as a “life-and-death situation”. He and his wife at the time, Kimberly, took legal action, suing the hospital and the drug manufacturer. In addition to their lawsuit, they used their platform to raise awareness about the dangers of medical errors, with Quaid questioning why the drug was not recalled after previous similar incidents. The couple eventually reached a settlement with the hospital in 2008.
Thomas Boone Quaid’s Childhood and Private Upbringing
Thomas and his sister were raised largely outside the public eye, with their parents making a conscious effort to shield them from constant media attention.
While their father is a major Hollywood star and their older brother is a rising actor, Thomas and Zoe were kept away from the limelight. They experienced a relatively normal childhood, with occasional public sightings at family events and on their brother Jack’s social media. This private upbringing allowed Thomas to grow up without the pressures of fame, focusing on his education and personal development.
What Is Thomas Boone Quaid Doing in 2026?
In 2026, Thomas Boone Quaid is beginning his freshman year at the University of Colorado Boulder, where he is studying business.
This marks a major milestone as he transitions into adulthood and independence. He graduated from high school on June 3, 2026, at a ceremony in Los Angeles, which was a family affair attended by both his parents. His father, Dennis, has spoken about this new chapter, saying, “They’re out there on their own now” as he embraces becoming an empty-nester. Thomas is focused on his education and building his own path, separate from his family’s Hollywood legacy.
Final Thoughts
The story of Thomas Boone Quaid is one of survival, privacy, and a deliberate choice to forge his own identity. From a terrifying start that could have ended tragically, he grew into a healthy young man shielded from the excesses of Hollywood. Now, as he begins his college career, Thomas is writing his own story, one defined not by his famous last name, but by his own choices and ambitions.
Frequently Asked Questions About Thomas Boone Quaid
How old is Thomas Boone Quaid?
Thomas Boone Quaid is 18 years old, having been born on November 8, 2007.
Who is Thomas Boone Quaid’s mother?
His mother is Kimberly Buffington, a real estate professional who was married to Dennis Quaid.
Does Thomas Boone Quaid have a twin?
Yes, he has a twin sister named Zoe Grace Quaid.
Is Thomas Boone Quaid related to Jack Quaid?
Yes, Jack Quaid is his older paternal half-brother.
What happened to Thomas Boone Quaid after birth?
He and his twin sister were given a massive, accidental overdose of the blood thinner Heparin, which nearly killed them.
Does Thomas Boone Quaid have an acting career?
No, he does not have an acting career and has chosen to stay out of the public entertainment industry.
