Liam Costner has a connection to one of Hollywood’s most recognisable families, but he has largely stayed away from the entertainment industry that made his father famous. The son of award-winning actor Kevin Costner and Bridget Rooney has pursued a career in real estate rather than following his father into acting.
Born in Los Angeles, California, Liam is known for maintaining a private lifestyle despite his family’s public profile. He reportedly works as a real estate agent with the Frankel Bell Group in North Palm Beach County, keeping much of his professional and personal life away from public attention.
His family background, however, continues to attract interest, particularly because of his parents’ relationship, his connection to the wider Costner family and the circumstances surrounding his recognition by his father.
Liam Costner’s Age, Background and Personal Details
Liam Costner was born on 15 November 1996 in Los Angeles, United States. As of 2026, he is 29 years old, and his zodiac sign is Scorpio.
He is an American citizen and is reported to live in Los Angeles. Although information about his private life is limited, published biographical profiles describe him as someone who prefers to remain outside the celebrity spotlight.
Liam is also reported to have enjoyed sports while growing up, particularly baseball and football. Unlike several of his half-siblings, however, he has not pursued a public career in film, music or television.
What Does Kevin Costner’s Son Do for a Living?
Liam has built his professional life around real estate. He is reported to work with the Frankel Bell Group, a property agency serving North Palm Beach County.
Details about his individual transactions, earnings and career milestones are not widely available. His preference for privacy has made it difficult to establish a complete picture of his professional activities.
His career choice stands in contrast to that of his father, Kevin Costner, whose work as an actor, producer and director has brought international recognition. Liam’s reported involvement in property sales allows him to pursue a profession separate from the entertainment business.
Who Are Liam Costner’s Parents?
Liam is the son of Kevin Costner and Bridget Rooney, whose relationship began after the actor’s first marriage ended.
Kevin Costner is known for films such as Dances with Wolves and Robin Hood: Prince of Thieves, as well as the television series Yellowstone. His career has earned him major industry honours, including Academy Awards, Golden Globes and a Primetime Emmy Award.
Bridget Rooney has maintained a considerably lower public profile. She is known for her connection to the Costner family and has also been associated with the short film Zombie or Not Zombie.
The couple never married and separated before Liam’s birth. Their relationship nevertheless became a significant part of the actor’s personal history because of the questions surrounding Liam’s paternity.
The Paternity Test That Established Kevin Costner’s Relationship With Liam
Reports about Liam’s early life state that Kevin requested a paternity test before formally establishing that he was Liam’s father. Once paternity was confirmed, the actor reportedly created a trust fund for his son.
Rooney, meanwhile, expressed confidence about Liam’s paternity during a 1996 interview with New York Magazine. She said she was certain about the identity of the father and intended to continue with her pregnancy regardless of whether Costner provided support.
The circumstances surrounding the paternity test have remained part of Liam’s public biography. However, he has generally kept details of his relationship with his father and the financial arrangements between them private.
Liam Costner’s Seven Half-Siblings
Liam is part of an extended family that includes children from both of his parents’ other relationships.
Kevin Costner has six other children. Three—Annie, Lily and Joseph—are from his first marriage to Cindy Silva, which lasted from 1978 to 1994.
The actor also has three children—Cayden Wyatt, Hayes Logan and Grace Avery—from his former marriage to Christine Baumgartner. Their divorce was finalised in 2024.
Liam also has a maternal half-sister, Kaitlin K.K. Koch, from Bridget Rooney’s marriage to billionaire businessman William Koch.
This means Liam is reported to have seven half-siblings in total. Several of his paternal half-siblings have pursued careers in entertainment: Annie has worked as a film producer, Lily has been involved in acting and music, and Joseph has worked in music and sound engineering.
His Mother’s Marriage to Billionaire William Koch
After her relationship with Kevin Costner ended, Bridget Rooney married William Koch, an American businessman and member of the prominent Koch family.
Koch is known for his business interests and wealth, while Rooney has largely remained outside the entertainment industry. Their family life has received less public attention than Kevin Costner’s career and relationships.
Through her marriage to Koch, Rooney’s family became connected to another prominent American business family, further broadening Liam’s family background beyond Hollywood.
Is Liam Costner Married or Dating Anyone?
Liam Costner’s relationship status has not been clearly established through reliable public information. Biographical profiles have described him as single, but he has not publicly confirmed a partner or marriage.
There is also no widely verified public information confirming that he has children.
Given his preference for privacy, the absence of public details should not necessarily be taken as proof of his current relationship status. Liam has not made his personal relationships a regular subject of public discussion.
What Is Liam Costner’s Net Worth?
Liam Costner’s net worth has not been reliably established by an authoritative financial publication. His reported work in real estate may provide income through property transactions, but his earnings and assets are not publicly documented in sufficient detail to calculate a dependable figure.
There have also been reports that Kevin Costner established a trust fund for Liam after paternity was confirmed. The value and current terms of any such arrangement have not been publicly verified.
Kevin Costner’s wealth is estimated by celebrity-finance websites, although the figures vary considerably. Estimates have ranged from approximately $100 million to $200 million in recent years, but these are not official financial disclosures.
His father’s estimated fortune should not be confused with Liam’s personal net worth. Without verified information about Liam’s assets, earnings or inheritance, any specific estimate of his wealth would be speculative.
Kevin Costner’s Career and Family Life
Kevin Costner established himself as a major Hollywood figure through a career spanning acting, directing and producing. His work in Dances with Wolves earned him widespread acclaim, while Yellowstone introduced him to a new generation of television viewers.
Away from the screen, his family life has also attracted considerable public interest because of his relationships and children from different partnerships.
Liam’s story is one part of that larger family history. While his father has spent decades in the public eye, Liam has chosen a more private professional path, with real estate reportedly serving as his main career.
Liam Costner’s Life Beyond His Famous Surname
Liam Costner remains best known publicly as Kevin Costner’s son, but his reported work in real estate distinguishes his career from his father’s entertainment achievements.
His family background includes Hollywood success, a high-profile paternity story and connections to the business world through his mother’s marriage to William Koch. Despite that attention, Liam has kept most details about his daily life, finances and relationships out of public view.
For now, the clearest picture of Liam is that of a real estate professional who has largely avoided celebrity culture, choosing a quieter life despite having one of Hollywood’s best-known surnames.
