Thomas Boone Quaid: Dennis Quaid's Son and His Twin Story

Who is Thomas Boone Quaid? The name sits at the center of one of Hollywood's scariest hospital stories and one of its steadiest family files.

Thomas Boone Quaid is the twin son of actor Dennis Quaid and his ex-wife Kimberly Buffington. He was born on November 8, 2007, in Santa Monica, California, per his biography. His birth went by surrogate. His first eleven days then turned into a national medication-safety case that still gets cited in medical journals today.

The 2007 Birth Record

The facts sit in the official file. Thomas Boone Quaid arrived on November 8, 2007, per the biography record. The birth took place in Santa Monica, California, as one half of a fraternal twin pair.

The route was a surrogate, per the record. Thomas Boone Quaid entered the world beside his sister Zoe Grace. The twins then spent their early days under hospital care at Cedars-Sinai Medical Center in Los Angeles.

The pregnancy itself was planned quietly. Dennis Quaid and Kimberly Buffington had married three years earlier and wanted children after his first two marriages, per the same biography. The surrogate route delivered their wish in a single birth.

The birthplace detail rounds out the record. Santa Monica sits only miles from Cedars-Sinai, the hospital where the twins spent their first weeks, per the press record above.

The Cedars-Sinai Heparin Event

The scare came at day ten. On November 18, 2007, hospital staff at Cedars-Sinai mistakenly gave the twins a dosage of heparin, a blood thinner. The dose ran 1,000 times the common level for infants, per the press record.

The scare became public in an ugly way. The news leaked to the website TMZ before the extended Quaid family had even learned of it, per the press record. The story published on the same day the error surfaced. The hospital promised an investigation into the leak.

Thomas Boone Quaid and Zoe Grace both survived the error. The recovery took doctors' intervention and time, and the family later told the story themselves. Dennis Quaid and Kimberly Buffington discussed the ordeal with the Los Angeles Times in January 2008, per the paper's interview record.

The aftermath changed policy chatter. Quaid filed a lawsuit against the drug maker Baxter Healthcare. His claim argued that the packaging for the two doses of heparin was not different enough, per the record. In May 2008, the couple testified before the United States House Committee on Oversight and Government Reform. They asked Congress not to limit malpractice claims against drug makers, per the same record.

The case forged a second career. Dennis Quaid became a patient-safety advocate. He produced the Discovery Channel documentaries Chasing Zero in 2010 and Surfing the Healthcare Tsunami in 2012. He also co-wrote a medical-journal article on patient stories, per the same biography.

Twin Sister Zoe Grace

The twin pairing is central to the file. Zoe Grace Quaid is Thomas's fraternal twin sister, born the same day through the same surrogacy, per the record.

The twins grew up largely outside the press. Their family appearances stayed limited, and the parents' separation files mention both children only through custody filings. That handling kept the twins off magazine covers the way other celebrity kids rarely manage.

Parents: Dennis Quaid and Kimberly Buffington

The parents' marriage lasted fourteen years. Dennis Quaid married Kimberly Buffington on July 4, 2004, at his ranch in Paradise Valley, Montana, per the record. She was a Texas real estate agent by trade.

Their union ran through the scare, two separations, and one reconciliation. Buffington filed for divorce in March 2012, then withdrew it that April, per the record. She filed for legal separation again in October 2012. Quaid answered with his own divorce filing in November 2012. The couple then reconciled, and the case was dismissed by September 2013, per the same record. A final split came with a joint statement in June 2016. The court finalized the divorce on April 27, 2018.

Both parents stayed the constant in the children's story. The custody filings asked for joint or shared arrangements, and the twins remained registered to both homes after the proceedings.

Dennis Quaid's history before that marriage explains the household shift. His first wife was actress P. J. Soles, whom he met on the set of Our Winning Season. They were married in 1978 and divorced in 1983, per the record.

The second marriage brought the older half-brother. Quaid met actress Meg Ryan during the shooting of their film D.O.A. He married her on February 14, 1991, per the record. Their son Jack arrived in 1992, and the divorce finalized in July 2001, years before the twins were born.

The Wider Quaid Family Tree

Thomas Boone Quaid's family stretches across two Hollywood generations. His father, Dennis William Quaid, was born on April 9, 1954, in Houston, Texas, per the biography. His grandparents were an electrician father and a real-estate agent mother.

The half-sibling count holds one famous face. Thomas Boone Quaid's older half-brother is Jack Quaid, the actor born in 1992 to Dennis Quaid and Meg Ryan, per the record. His uncle is actor Randy Quaid. The family tree even carries the cowboy performer Gene Autry as a first cousin twice removed, per the same source.

The twin's own branch stays inside Texas roots. His mother's real-estate family and the ranch marriage tied the children to both coasts. The balance left them one acting legacy and one home state.

One acting footnote fits the file neatly. Dennis Quaid played the divorced father of twins in the 1998 remake of The Parent Trap, per the biography. The casting came a full decade before he became one in real life.

What Else Do People Ask About ?

Who is Thomas Boone Quaid?

He is the twin son of actor Dennis Quaid and his ex-wife Kimberly Buffington. His birth record dates to November 8, 2007, in Santa Monica, California, per his biography.

How old is Thomas Boone Quaid?

He turned 19 on November 8, 2026, based on his 2007 birth record.

Does Thomas Boone Quaid have siblings?

Two. His twin sister Zoe Grace Quaid and his older half-brother Jack Quaid, the actor, per the record. Jack was born in 1992 to Dennis Quaid and Meg Ryan.

What happened to Thomas Boone Quaid at Cedars-Sinai?

At ten days old, hospital staff gave him and his twin a heparin dosage 1,000 times the infant level. Both recovered, and the case became a patient-safety landmark, per the press record.

Was Thomas Boone Quaid born via surrogate?

Yes, per his biography. He and Zoe Grace were born to a surrogate on November 8, 2007, at their parents' request after three years of marriage.

Where does Thomas Boone Quaid live?

No verified residence exists in the public record. His custody filings tied the twins to California households, per the court coverage, and his Texas roots run through his mother's side.

Who is Thomas Boone Quaid's mother?

Kimberly Buffington, a Texas real estate agent, married to Dennis Quaid from 2004 to their 2018 divorce, per the record.

Conclusion

Thomas Boone Quaid's file mixes an ordinary demand and an extraordinary record. A surrogate twin birth in Santa Monica anchors the file. A drug-dose error that reshaped federal testimony sits next to it. A family tree loaded with actors fills the rest, and that mix makes his page worth the read.

The twins survived, the parents' marriage did not, and the patient-safety legacy stayed. Thomas Boone Quaid enters 2027 as an adult with his story archived, and the verified record now lives in one place.