Thomas Boone Quaid is the son of actor Dennis Quaid and his former wife, Kimberly Buffington. He was born through a gestational carrier on November 8, 2007, alongside his twin sister, Zoe Grace Quaid. Thomas is 19 years old and studies business at the University of Colorado Boulder, according to a 2026 interview with his father.

His name also connects to a serious medical emergency that happened shortly after his birth. Thomas and his twin sister received an incorrect dose of heparin at Cedars-Sinai Medical Center. Both children recovered.

Today, Thomas has reached a new stage of life as a college student. Here is what is known about his family, childhood, education, and personal life.

Quick Facts About Thomas Boone Quaid

Who Is Thomas Boone Quaid?

Thomas Boone Quaid is best known as one of Dennis Quaid’s three children. His father is an American actor, while his mother, Kimberly Buffington, worked in real estate.

Thomas was born through a gestational carrier on November 8, 2007, with his twin sister, Zoe. Their birth brought Dennis and Kimberly into a new stage of family life. The twins also became known because of a serious medical mistake during their early days.

His childhood medical emergency received public attention in 2007 and 2008. His parents later spoke about the incident before the US House Committee on Oversight and Government Reform.

Thomas has since grown up and moved on to college. A PEOPLE interview published on August 27, 2026, confirmed his high school graduation and college plans. The interview also reported that he studies business at the University of Colorado Boulder.

Unlike his father and older half-brother, Thomas does not have an established public acting career in the sources reviewed.

How Old Is Thomas Boone Quaid?

Thomas Boone Quaid is 19 years old. He was born on November 8, 2007, in Santa Monica, California.

He celebrated his 19th birthday on November 8, 2026. His birthday comes shortly before the end of each calendar year.

Here is his age timeline:

Thomas shares his birthday with his twin sister, Zoe Grace Quaid. Both children were born on the same day, just two minutes apart.

The date and family details also appear in Dennis and Kimberly Quaid’s written testimony to Congress in May 2008.

Who Are Thomas Boone Quaid’s Parents?

Thomas Boone Quaid was born through a gestational carrier to Dennis Quaid and Kimberly Buffington. His parents welcomed him and his twin sister in November 2007.

Although they later divorced, both remain part of his family history.

Dennis Quaid

Dennis Quaid is Thomas’s father and a well-known American actor. He has appeared in several films and television productions during his career.

He became a father to Thomas and Zoe in 2007. He also has an older son, Jack Quaid, from his earlier relationship with actress Meg Ryan.

Dennis has spoken publicly about his children and their lives. He also discussed the medical emergency involving Thomas and Zoe during interviews and congressional testimony.

The incident changed how he spoke about hospital medication errors. He later became involved in efforts to raise awareness about patient safety.

In August 2026, Dennis shared another family update. He spoke to PEOPLE about taking his twins to college and seeing them begin adult life.

Kimberly Buffington

Kimberly Buffington is Thomas’s mother and Dennis Quaid’s former wife. She worked in real estate before becoming known through her marriage to the actor.

Dennis and Kimberly married in 2004. They welcomed their twins, Thomas and Zoe, three years later through a gestational carrier.

The couple later divorced. Their relationship is part of Thomas’s family background, but there is limited verified public information about his mother’s private life.

Kimberly also joined Dennis in speaking about the medication error involving their newborn twins. Their written testimony before Congress provides a first-hand account of what happened.

Does Thomas Boone Quaid Have Siblings?

Yes. Thomas has a twin sister named Zoe Grace Quaid and an older paternal half-brother named Jack Quaid.

His siblings come from different parts of his father’s family.

Zoe Grace Quaid, His Twin Sister

Zoe Grace Quaid is Thomas’s twin sister. She was born on November 8, 2007, two minutes after him.

Thomas weighed 6 pounds and 12 ounces at birth. Zoe weighed 5 pounds and 9 ounces.

Both children experienced the same serious medication error during their early hospital treatment. They received an incorrect concentration of heparin. Their parents later shared the details of the incident publicly.

Zoe has also reached an important education milestone. PEOPLE reported that she graduated from high school on May 23, 2026.

According to the same report, Zoe planned to study business at the University of Virginia. Thomas chose the University of Colorado Boulder.

Jack Quaid, His Older Half-Brother

Jack Quaid is Thomas’s older paternal half-brother. Jack’s parents are Dennis Quaid and actress Meg Ryan.

Jack was born on April 24, 1992. He later followed his parents into the entertainment industry and built an acting career.

He appeared in The Hunger Games and The Boys. His work has made him a familiar name among television and film viewers.

Jack and Thomas share the same father, Dennis Quaid. However, they have different mothers.

Thomas has not established a similar public acting career in the sources reviewed. His latest reported milestone is his move to college.

What Happened to Thomas Boone Quaid as a Baby?

Thomas and his twin sister experienced a serious medical emergency during their early hospital treatment. A medication error exposed both babies to a much stronger heparin solution than doctors intended.

The incident happened at Cedars-Sinai Medical Center. Their parents later explained the mistake in written testimony before Congress on May 14, 2008.

The case received attention because the medication concentration was far higher than the prescribed amount.

Why Thomas and Zoe Were Hospitalized

Thomas and Zoe were born four weeks premature but were healthy at birth. They went home after three days. On their eleventh day, doctors admitted them to Cedars-Sinai with staph infections.

Their doctors used a low-concentration heparin solution to keep their intravenous lines clear.

Heparin is a medication that helps prevent blood from clotting. The hospital intended to use a solution containing 10 units per milliliter.

However, the twins received a different product with a much higher concentration. This mistake exposed both newborns to a serious medication overdose.

Their parents later described the experience in detail during congressional testimony.

How the Heparin Overdose Happened

The main problem involved two different heparin concentrations. The hospital used the wrong solution when treating the twins.

The difference was 1,000 times the intended concentration.

According to their parents’ testimony, the incorrect medication was given twice. The two doses were about eight hours apart.

This was a serious error because the twins were newborn babies. Their parents later explained how the mistake affected their family.

The case also raised questions about medication storage and checking procedures inside hospitals.

What Happened After the Medication Error?

Both twins received medical care after the overdose. Their parents described the frightening experience in their congressional testimony.

Thomas and Zoe spent 11 days in intensive care after the overdose. They left the hospital by early December 2007, according to reports.

Dennis Quaid later spoke about their health during a CNN interview in April 2010. He said the twins were doing well.

This recovery became an important part of the family’s story. Thomas and Zoe both moved forward after the difficult start to their lives.

Did Cedars-Sinai Face Penalties?

Yes. California health regulators took action after the medication error.

The Los Angeles Times reported that a state investigation found problems with medication storage and hospital procedures. These included failures to check drug labels and maintain proper medication records.

CBS News reported that Cedars-Sinai received a $25,000 fine on March 20, 2008. The report linked the penalty to the medication incident involving three infants.

The case also brought attention to the need for better medication checks in hospitals.

Dennis and Kimberly Quaid established The Quaid Foundation in early 2008. It aimed to raise awareness about medical errors and improve patient safety.

It is important to separate their public advocacy from Thomas’s personal activities. There is no verified information showing that Thomas personally took part in this work.

Where Does Thomas Boone Quaid Go to College?

Thomas Boone Quaid attends the University of Colorado Boulder, according to an interview with Dennis Quaid published by PEOPLE on August 27, 2026.

The interview confirmed that Thomas graduated from high school on June 3, 2026. He then started college in August 2026.

Dennis also spoke about taking his twins to college. It marked an important change for the family as both children began their next stage of education.

Thomas studies business at the University of Colorado Boulder. However, the available reporting does not name his exact business major.

Here is a short timeline of his education:

There is no verified information about his high school name, grades, or expected college graduation date.

His twin sister Zoe also started college in 2026. PEOPLE reported that she planned to study business at the University of Virginia.

Is Thomas Boone Quaid an Actor?

There is no verified public evidence that Thomas Boone Quaid has started a professional acting career.

His father, Dennis Quaid, works in the entertainment industry. His older half-brother, Jack Quaid, is also an actor.

However, their careers do not establish Thomas’s profession.

The most recent confirmed information about Thomas concerns his education. Dennis Quaid told PEOPLE in August 2026 that Thomas had graduated from high school and started studying business at the University of Colorado Boulder.

There is no verified list of films, television shows, or professional acting projects connected to Thomas.

For now, it is more accurate to describe him as Dennis Quaid’s son and a college student.

What Is Known About Thomas Boone Quaid’s Personal Life?

Thomas keeps a limited public profile. Most verified information about him comes from reports about his family, childhood, and education.

His parents are well-known public figures. His older half-brother also works in entertainment. However, Thomas has not established the same public career in the available reporting.

His college education is one of the clearest recent updates. He studies business at the University of Colorado Boulder, according to his father’s 2026 interview.

Several details about his private life remain unconfirmed.

It is also important to separate Thomas’s finances from his father’s wealth. No reliable personal net-worth figure for Thomas was established in the sources used for this article.

His father’s public career does not prove that Thomas has the same income or financial position.

Frequently Asked Questions About Thomas Boone Quaid

What Is Thomas Boone Quaid’s Net Worth?

Thomas Boone Quaid’s personal net worth has not been established by reliable sources in this research. His father, Dennis Quaid, has a long acting career, but his wealth should not be assigned to Thomas.

Is Thomas Boone Quaid on Instagram?

An official Instagram account for Thomas Boone Quaid was not authenticated in this research. Search results include pages using his name, but that does not prove they belong to him.

Did Thomas Boone Quaid Recover From the Heparin Overdose?

Yes. Thomas and his twin sister, Zoe, recovered after receiving an incorrect heparin dose as newborns. They spent 11 days in intensive care after the overdose and left the hospital by early December 2007.

What Does Thomas Boone Quaid Study?

Thomas studies business at the University of Colorado Boulder. Dennis Quaid confirmed this in an interview with PEOPLE published in August 2026.

Is Jack Quaid Thomas Boone Quaid’s Brother?

Yes. Jack Quaid is Thomas’s older paternal half-brother. They share the same father, Dennis Quaid, but have different mothers.

Who Is Thomas Boone Quaid’s Twin Sister?

His twin sister is Zoe Grace Quaid. Both were born on November 8, 2007, with Thomas arriving two minutes before Zoe.

Where Was Thomas Boone Quaid Born?

Thomas was born in Santa Monica, California, on November 8, 2007. His twin sister, Zoe, was born two minutes later.

Conclusion

Thomas Boone Quaid is Dennis Quaid and Kimberly Buffington’s son. He grew up with his twin sister, Zoe, and older half-brother, Jack.

His early life included a serious heparin medication error, but both twins recovered. Thomas later graduated from high school and began studying business at the University of Colorado Boulder.

His family background is well documented, but details about his private life remain limited. The latest confirmed update places him in college, building his own path outside his family’s acting careers.

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