Liam Costner is the son of American actor and filmmaker Kevin Costner and Bridget Rooney. He was born in November 1996 and is one of Kevin Costner’s seven children. Unlike his famous father and some of his siblings, Liam has stayed away from Hollywood and keeps his personal life private. He has been reported to work in real estate.
Quick Facts
| Detail | Information |
|---|---|
| Full name | Liam Costner |
| Birth date | November 1996; November 15 is reported |
| Reported birthplace | Los Angeles, California, United States |
| Nationality | American |
| Father | Kevin Costner |
| Mother | Bridget Rooney |
| Paternal half-siblings | Annie, Lily, Joe, Cayden, Hayes, and Grace |
| Maternal half-sister | Kaitlin K.K. Koch |
| Reported profession | Real estate agent |
| Reported employer | Frankel Bell Group |
| Education | Not publicly confirmed |
| Relationship status | No publicly confirmed partner |
| Children | No publicly confirmed children |
| Net worth | Not reliably known |
| Social media | No verified public account identified |
Liam Costner’s Birth and Early Life
Liam Costner was born in November 1996. Some secondary sources give his exact birthday as November 15, 1996.
Los Angeles, California, is also reported as his birthplace.
Very little information about Liam’s childhood is publicly available. He has generally remained outside the entertainment spotlight.
Who Are Liam Costner’s Parents?
Liam’s parents are Kevin Costner and Bridget Rooney.
Kevin and Bridget had a relationship in the 1990s but never married. Liam Costner is their only child together.
PEOPLE has described Kevin and Bridget’s relationship as brief. Other secondary sources claim they dated for around three years, but the exact length of their relationship is not firmly established.
Who Is Kevin Costner?
Kevin Costner is Liam’s father. He is an American actor, director, producer, and musician.
Some of his best-known projects include:
- Dances with Wolves
- Field of Dreams
- Robin Hood: Prince of Thieves
- The Bodyguard
- Yellowstone
- Horizon: An American Saga
Kevin has received major honors during his career, including Academy Awards, Golden Globe Awards, and a Primetime Emmy Award.
He is the father of seven children from three relationships.
Who Is Bridget Rooney?
Bridget Rooney is Liam’s mother.
She belongs to the Rooney family, which is closely connected with the Pittsburgh Steelers. She has been identified as the niece of former Steelers owner Dan Rooney.
Bridget has also been linked with acting. Secondary sources mention an appearance in the short film Zombie or Not Zombie.
She later married businessman William “Bill” Koch.
Liam Costner’s Paternity and Trust Fund
Secondary reports say Kevin Costner requested a paternity test after Liam Costner was born.
According to those reports, the test confirmed that Kevin was Liam’s father. Kevin then reportedly established a trust fund for his son.
During her pregnancy, Bridget spoke about the situation in a 1996 New York Magazine interview. She said she was certain about the identity of her child’s father and planned to continue with the pregnancy regardless of Kevin’s involvement.
Liam Costner has since been publicly recognized as one of Kevin Costner’s seven children.
Liam Costner’s Education
Liam’s educational background is not publicly confirmed.
There is no reliable information identifying his school, college, university, degree, or field of study.
One secondary source says he played baseball and football while in school, but details about his teams or achievements are not available.
What Does Liam Costner Do?
Liam has been reported to work as a real estate agent.
One secondary source says he works with the Frankel Bell Group, a real estate team serving North Palm Beach County in Florida.
However, Liam Costner keeps a low public profile, and detailed information about his current work is limited.
Unlike his father and some of his siblings, he has not developed a publicly known acting career.
Liam Costner’s Siblings
Liam has six paternal half-siblings through Kevin Costner.
They are:
- Annie Costner
- Lily Costner
- Joe Costner
- Cayden Wyatt Costner
- Hayes Logan Costner
- Grace Avery Costner
He also reportedly has a maternal half-sister, Kaitlin K.K. Koch, through his mother’s marriage to Bill Koch.
Annie Costner
Annie Costner was born on April 15, 1984. She is Kevin’s oldest child from his marriage to Cindy Silva.
Annie appeared in movies including Dances with Wolves, The Baby-Sitters Club, and The Postman.
She later moved into film production and co-founded Sound Off Films in 2014.
Lily Costner
Lily Costner was born on August 4, 1986.
She appeared in The Baby-Sitters Club and The Postman. She is also a singer and songwriter and has contributed music to some of her father’s projects.
Joe Costner
Joe Costner was born on January 31, 1988.
He appeared in Tin Cup and The Postman when he was younger.
He later moved behind the camera and has worked as an audio engineer and production sound mixer.
Cayden, Hayes, and Grace Costner
Liam Costner has three younger paternal half-siblings from Kevin Costner’s former marriage to designer Christine Baumgartner.
Cayden Wyatt Costner was born on May 6, 2007.
Hayes Logan Costner was born on February 12, 2009. Hayes later had a role in his father’s western project Horizon: An American Saga.
Grace Avery Costner was born on June 2, 2010.
Kevin and Christine’s marriage ended in divorce in 2024.
Liam Costner’s Maternal Half-Sister
Liam also reportedly has a maternal half-sister named Kaitlin K.K. Koch.
Kaitlin is the daughter of Bridget Rooney and businessman Bill Koch.
Little reliable information is publicly available about Liam’s relationship with his maternal half-sister.
Kevin Costner’s Relationship With His Children
Kevin has spoken publicly about the importance of fatherhood.
In 2024, he told PEOPLE that his children are the “anchor” of his life. He explained that despite his work in entertainment, he understands where his responsibilities as a father lie.
Liam Costner is publicly recognized as one of Kevin’s seven children.
Details about Kevin and Liam’s private father-son relationship are limited, so it would be inaccurate to describe them as either close or distant based only on public appearances.
Does Liam Costner Attend Public Events?
Liam Costner rarely appears in the public spotlight.
Several of Kevin Costner’s other children have attended movie premieres and public events with their father.
For example, Annie, Joe, Cayden, Hayes, and Grace attended the Los Angeles premiere of Horizon: An American Saga in June 2024.
Liam was not identified among the children at that event.
His absence from individual public events does not establish anything about his relationship with his father or siblings.
Is Liam Costner Married?
Liam has not publicly confirmed a wife or partner.
Some secondary biography websites describe him as single, but his private relationship status is not firmly established.
Does Liam Costner Have Children?
Liam Costner does not have any publicly confirmed children.
He keeps his personal and family life away from public attention.
Where Does Liam Costner Live?
Liam’s current residence is not firmly confirmed.
One secondary source lists Los Angeles, California, as his residence. However, the same source connects his real estate work with North Palm Beach County, Florida.
Without stronger information, his current city should not be stated as certain.
Liam Costner’s Net Worth
Liam Costner’s personal net worth is not reliably known.
Secondary reports say Kevin established a trust fund for Liam after his paternity was confirmed. Liam may also earn money from his reported real estate career.
However, there is no reliable public information about the value of his trust fund, salary, property, investments, or other assets.
Kevin Costner’s wealth should not be treated as Liam’s personal net worth.
Is Liam Costner on Social Media?
No verified public social media account belonging to Liam has been identified.
He appears to prefer a private life and has a much smaller public presence than his father.
Liam Costner and Liam Hemsworth Are Different People
Liam Costner should not be confused with Liam Hemsworth.
Liam Hemsworth is an Australian actor known for The Hunger Games film series.
Liam Costner is Kevin Costner and Bridget Rooney’s son and has been reported to work in real estate.
Interesting Facts
- Liam Costner was born in November 1996.
- November 15 is reported as his exact birthday by secondary sources.
- He is the son of Kevin Costner and Bridget Rooney.
- His parents never married.
- He is one of Kevin Costner’s seven children.
- Liam has six paternal half-siblings.
- He also reportedly has a maternal half-sister, Kaitlin K.K. Koch.
- His mother belongs to the Rooney family connected with the Pittsburgh Steelers.
- Kevin reportedly established a trust fund for Liam.
- Liam has been reported to work as a real estate agent.
- He has stayed away from a public Hollywood career.
- His education is not publicly confirmed.
- He has not publicly confirmed a wife or partner.
- He has no publicly confirmed children.
- His current residence is not firmly established.
- His personal net worth is not reliably known.
- No verified public social media account has been identified for him.
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