Thomas Boone Quaid is the son of actor Dennis Quaid and his third wife, Kimberly Buffington. He was born on November 8, 2007, in Santa Monica, California, as the older of twins with his sister Zoe Grace Quaid, and he turned 19 in November 2026.
He is not an actor and keeps a low profile, so most of what is public comes from his father’s interviews and court records. This Scan Insider profile sticks to those verified facts: his birth, the hospital error that made headlines, his siblings and where he is today.
Key Takeaways
- Thomas was born on November 8, 2007, via a gestational surrogate.
- His parents are Dennis Quaid and Kimberly Buffington, who divorced in 2018.
- At 10 days old, he and his twin sister received an accidental heparin overdose at Cedars-Sinai and recovered fully.
- His half-brother is actor Jack Quaid, Dennis’s son with Meg Ryan.
- He finished high school in June 2026 and started college that August.
Thomas Boone Quaid Quick Facts
| Detail | Information |
|---|---|
| Full name | Thomas Boone Quaid |
| Known as | Son of actor Dennis Quaid |
| Date of birth | November 8, 2007 |
| Age | 19 (as of November 2026) |
| Birthplace | Santa Monica, California |
| Parents | Dennis Quaid and Kimberly Buffington |
| Twin sister | Zoe Grace Quaid |
| Half-brother | Jack Quaid (actor, born 1992) |
| Stepmother | Laura Savoie (married Dennis in 2020) |
| Current status | College student (since August 2026) |
Birth and Parents
Dennis Quaid married Kimberly Buffington on July 4, 2004, at his ranch in Paradise Valley, Montana. The couple welcomed fraternal twins through a gestational carrier three years later, according to Dennis Quaid’s Wikipedia biography.
Born First, Two Minutes Ahead of Zoe
Thomas arrived at 8:26 a.m. on November 8, 2007, weighing 6 lbs. 12 oz. His sister Zoe Grace followed two minutes later at 5 lbs. 9 oz. Dennis’s publicist confirmed the births to PEOPLE at the time.
Thomas is Dennis’s second son, after Jack Quaid, and the twins are Dennis and Kimberly’s only children together.
The 2007 Heparin Overdose
Shortly after birth, the twins were treated for staph infections at Cedars-Sinai Medical Center in Los Angeles. On November 18, 2007, when they were 10 days old, hospital staff mistakenly gave them a dose of the blood thinner heparin about 1,000 times stronger than the usual infant dose.
Both babies recovered and were discharged in early December 2007. Here is how the incident shaped the family’s public life:
- Dennis sued the drug maker, Baxter Healthcare, arguing that the packaging of two heparin strengths looked too similar.
- Dennis and Kimberly founded The Quaid Foundation to work on reducing medical mistakes.
- In 2008, Dennis testified before Congress against rules that would limit patients’ ability to sue drug companies.
- He went on to become a well-known patient-safety advocate.
Speaking to WebMD in 2008, when the twins were 10 months old and meeting their milestones, Dennis admitted the worry had not fully gone away: “No one knows the long-term effect of the dose they received.”
Siblings and the Wider Quaid Family
Thomas grew up as part of a blended Hollywood family, which we map out in our guide to all of Dennis Quaid’s kids. His closest relatives are:
- Zoe Grace Quaid – his twin sister, born two minutes after him.
- Jack Quaid – his older half-brother, born April 24, 1992, to Dennis and actress Meg Ryan. Jack is known for The Boys and Scream.
- Laura Savoie – his stepmother, who married Dennis on June 2, 2020, in Santa Barbara.
- Randy Quaid – his uncle, Dennis’s older brother and an actor.
For more children of famous parents, browse our celebrity kids profiles, including Laurie Metcalf’s son Will Roth and Mr. T’s eldest daughter, Lesa.
His Parents’ Divorce and Family Life
Dennis and Kimberly’s divorce was finalized on April 27, 2018, when Thomas was 10. Dennis married Laura Savoie two years later. You can read about other famous marriages in the Scan Insider spouses section.
In May 2026, Dennis asked a court to end his $13,750 monthly child support payments to Kimberly as the twins finished high school, CBS Austin reported, citing documents first obtained by PEOPLE. The request relied on their 2018 divorce agreement, which lets payments end once each child completes 12th grade.
Education and Career
Thomas has not followed his father and half-brother into acting. He graduated from high school on June 3, 2026, and Dennis and Kimberly reunited for his ceremony, PEOPLE reported.
In August 2026, Dennis told PEOPLE, “My twins, they just started college,” adding that he had dropped them off the week before. Thomas plans to study business. The family has not shared further details, and we do not publish more about his schooling.
Relationship with Dennis Quaid
Dennis rarely talks about his youngest children, but his comments over the years are warm. In March 2008 he joked, “It’s great to be a normal dad with the normal problems of not having enough hands for both of them.”
By December 2015, on the Allegedly podcast, he said the twins were “perfectly normal as could be now” and “like head of their class.” In 2008 he was fond of saying, “These kids are going to change the world.”
Timeline of Key Events
| Year | Event |
|---|---|
| 2004 | Dennis Quaid marries Kimberly Buffington in Montana |
| Nov 8, 2007 | Thomas and Zoe are born in Santa Monica |
| Nov 18, 2007 | Heparin overdose at Cedars-Sinai; both twins recover |
| 2008 | Dennis testifies before Congress on drug safety |
| 2018 | Dennis and Kimberly’s divorce is finalized |
| 2020 | Dennis marries Laura Savoie |
| June 2026 | Thomas graduates from high school |
| August 2026 | Thomas starts college |
Life Today
At 19, Thomas lives a largely private life. He does not have a public acting career, and his family shares little about his daily life. Any claims online about his net worth, relationships or social media accounts are not publicly confirmed.
Our editorial policy is to keep details about young adults limited to what their families have chosen to make public. Find more verified family bios on the Scan Insider homepage.
Frequently Asked Questions
How old is Thomas Boone Quaid?
Thomas was born on November 8, 2007, in Santa Monica, California, which makes him 19 years old as of November 2026. He is the older of two fraternal twins, arriving two minutes before his sister, Zoe Grace Quaid. The twins were born to Dennis Quaid and Kimberly Buffington via a gestational surrogate.
Who is Thomas Boone Quaid’s mother?
His mother is Kimberly Buffington, Dennis Quaid’s third wife. The couple married on July 4, 2004, in Montana and welcomed Thomas and his twin sister in 2007 through a gestational carrier. Their divorce was finalized in April 2018, and Kimberly reunited with Dennis for Thomas’s high school graduation in June 2026.
How many kids does Dennis Quaid have?
Dennis Quaid has three children. His eldest is actor Jack Quaid, born in 1992 to Dennis and Meg Ryan. His younger two are the twins Thomas Boone and Zoe Grace, born in November 2007 to Dennis and Kimberly Buffington. Dennis has been married to Laura Savoie since 2020.
Sources
- Wikipedia – Dennis Quaid (birth of the twins, heparin incident, marriages)
- WebMD – How Are the Quaid Twins Doing? (2008)
- CBS Austin – Dennis Quaid files petition to stop paying child support (May 2026)
Featured image: Dennis Quaid, Thomas Boone Quaid’s father, at CinemaCon 2024. Photo by Gage Skidmore, CC BY-SA 2.0, via Wikimedia Commons.
