Liam Timothy Costner is an American real estate agent born on November 15, 1996, in Brazil, Indiana. At 28 years old in 2025, Liam is best known as the son of famous Hollywood actor Kevin Costner and Bridget Rooney, from the notable Pittsburgh Steelers’ Rooney family. While he has chosen a career outside of the entertainment industry, working as a real estate agent, his family background keeps him in the public eye. Liam currently lives in Florida and has a net worth estimated at around $1 million. The story below tells you everything you need to know about Liam Costner biography.
Quick Bio Table of Liam Costner
| Detail | Information |
|---|---|
| Full Name | Liam Timothy Costner |
| Birth Date | November 15, 1996 |
| Age (in 2025) | 28 years old |
| Birthplace | Brazil, Indiana, United States |
| Father | Kevin Costner |
| Mother | Bridget Rooney |
| Stepfather | Bill Koch |
| Profession | Real Estate Agent |
| Marital Status | Not married |
| Net Worth (2025) | Around $1 million |
| Current Residence | Florida, USA |
| Known For | Son of Kevin Costner |
Who is Liam Costner?
Liam Timothy Costner is an American real estate agent based in Brazil, Indiana. In 2025, he will be 28 years old and most recognized as the son of Oscar-winning actor Kevin Costner and Bridget Rooney, a member of the Pittsburgh Steelers’ founding family. Liam has chosen a profession outside of the entertainment world, working for the Frankel Bell Group in Northern Palm Beach County, FL. His net worth is reported to be around $1 million, derived mostly from his real estate industry and family connections. Despite his celebrity status, Liam maintains a low public presence, focusing on his personal success.
Liam Costner’s Known Social Profiles
| Platform | Username / Handle | Notes |
|---|---|---|
| @stwvenmarshman93 | 3 posts, 105 followers, 73 following. Very limited activity. | |
| Liam Timothy Costner | Profile is locked; limited public information available. |
Liam Costner’s Early Life and Background
His Timothy Costner was born in Indiana, USA, to Hollywood actor Kevin Costner and Bridget Rooney, who is a member of the well-known Pittsburgh Steelers Rooney family. His early life was shaped by his parents’ brief relationship, which terminated before his birth, yet both played important roles in his upbringing. Kevin Costner initially demanded a paternity test, which verified their biological relationship, and then established a trust fund to assist Liam’s future.
Liam grew up in a blended home that included multiple half-siblings from his father’s prior marriages. He grew up primarily away from the Hollywood spotlight, in Aspen, Colorado, where he attended Oxbridge Academy. His education centered on business and finance, which is consistent with his current work in real estate. Despite his illustrious family background, Liam chooses to keep a low profile and live a life outside of the entertainment business.
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Liam Costner’s Relationship with His Parents
Kevin Costner’s Role as Father
Kevin Costner was initially hesitant to admit paternity when Bridget Rooney became pregnant with Liam. However, Rooney insisted on a paternity test, which verified Costner as Liam’s father. Following the confirmation, Costner established a significant trust fund in Liam’s name to secure his future. Despite this gesture, their relationship remained distant, with Costner paying Liam occasional visits but not on a regular basis.
Bridget Rooney’s determination
Bridget Rooney was determined to ensure that Liam had a relationship with his biological father. She aggressively sought a paternity test to determine Kevin Costner’s paternity. Following the test findings, she tried to develop a co-parenting arrangement in which both parents share responsibility for raising Liam. Despite the initial difficulties, Rooney’s efforts helped Liam connect with his father.
Liam Costner’s Seven Half-Siblings: Their Names and Brief Profiles
Annie Costner
- Born: 1984
- Profession: Actress and Model
Annie is well-known for her roles in a few independent films as well as modeling. She is Kevin Costner’s oldest child with his first wife, Cindy Silva.
Lily Costner
- Born: 1986
- Profession: Actress and Model
Lily is known for her roles in films and television shows, including appearances alongside her father. She is known for her modeling profession and campaigning for mental health awareness.
Joe Costner
- Born: 1988
- Profession: actor and musician.
Joe is well-known for his parts in independent films as well as his ambition to pursue a music career. He also performs in theater.
Cayden Costner
- Born: 2006
- Profession: Child actor
Cayden has had a few brief film roles and is one of Kevin Costner’s younger children with Christine Baumgartner.
Hayes Costner
- Born: 2009
- Profession: Child actor
Known For: Hayes, like Cayden, began acting during his childhood.
Grace Costner
- Born: 2010
- Profession: Private / Not Public Figure
Grace is the youngest of Kevin Costner’s children, with little public exposure.
Liam Timothy Costner
- Born: 1996
- Profession: Real Estate Agent.
He is most known as Kevin Costner’s son, but he has pursued a career outside of Hollywood, focusing on real estate.
Liam Costner and His Father Kevin Costner: Their Relationship
Liam Costner’s relationship with his father, Kevin Costner, has been complex and distant. Kevin was initially unwilling to recognize fatherhood, thus a paternity test was required to identify Liam as his son. Following this confirmation, Kevin established a trust fund to support Liam’s future, but remained little involved in his life.
Their interactions have been intermittent over the years, with Kevin paying visits but not being present on a regular basis. Despite this, Liam has shown respect for his father and has concentrated on forging his own path outside of the entertainment world. Liam prefers to keep family problems out of the public light, thus their connection remains private.
Liam Costner and His Stepfather Bill Koch: Their Relationship
Bill Koch, Liam Costner’s stepfather, is a rich businessman and yacht owner who married Liam’s mother, Bridget Rooney, in 2005. Bill is a member of the prominent Koch family, which is well-known for its corporate empire and philanthropy. Growing up, Liam resided in Bill Koch’s spacious and beautiful 36,000-square-foot mansion, which was packed with precious art and furnishings. Despite the splendor, Liam’s mother was concerned about his safety in such a rich setting. Bill and Bridget also have a daughter, Kaitlin Koch, who is Liam’s half-sister. While Liam maintains a secluded existence, his background in an affluent and privileged family has affected many of his opportunities and experiences.
Liam Costner’s Education and Career Preparation
Liam Costner attended Oxbridge Academy, a top private school in West Palm Beach, Florida. The school is noted for its rigorous academic programs and emphasis on college preparation. Growing up away from the Hollywood spotlight, Liam had access to a supportive learning environment that prioritized both academics and personal growth. At Oxbridge, he developed interests that would subsequently shape his career decisions, particularly in business and finance. The school’s rigorous curriculum and emphasis on leadership helped develop his discipline and work ethic, laying the groundwork for his future achievements.
After finishing his secondary education, Liam pursued courses in business and finance, though information regarding his higher education are not well known. This educational focus is strongly related to his current work as a real estate agent, which needs extensive understanding of markets, negotiating, and financial management. By pursuing a job outside of the entertainment sector, Liam displayed a willingness to forge his own path, leveraging his knowledge to flourish in a competitive and demanding business environment.
Liam Costner’s Career as a Real Estate Agent
Liam Costner has established himself as a real estate agent in northern Palm Beach County, Florida. He is affiliated with the Frankel Bell Group and specializes in luxury homes, leveraging his business skills and knowledge of high-end markets. His responsibilities include advising clients through the complexity of buying and selling expensive residences, guaranteeing a smooth transaction. Liam’s approach is defined by professionalism, secrecy, and a dedication to satisfying each client’s specific goals.
In addition to his real estate pursuits, Liam has broadened his professional experience. He supposedly worked for the Aspen Skiing Company in December 2022 before starting as a producer at NFP, a well-known insurance and benefits consulting firm, in November 2022. These positions demonstrate his adaptability and eagerness to explore new industries, all while keeping a low profile. Liam’s career trajectory demonstrates his commitment to creating a legacy separate from his family’s popularity.
Liam Costner’s Relationship Status and Private Life
As of 2025, Liam Costner is still single. Unlike many celebrity offspring, who frequently receive media attention for their romances, Liam has always decided to keep his dating life private. Despite coming from a well-known family (he is Kevin Costner’s son and the Rooneys’ grandson), he avoids public appearances and rarely discloses personal information. His subtle approach to life has helped him to maintain a sense of normalcy, free from the demands of continual media attention.
Liam’s decision to remain unmarried appears to reflect his desire to focus on his work and personal development. He is currently working in real estate and appears to be determined to developing a professional identity independent from his family’s reputation. While nothing is known about his previous relationships, the paucity of public information emphasizes his desire for seclusion. Liam clearly loves his independence and has no desire to settle down, preferring to live a quiet, purposeful life on his own terms.
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Inside Liam Costner’s Wealth and Way of Life
Liam Costner lives a peaceful and secluded life, away from the usual celebrity spotlight. Liam was raised in luxurious surroundings, including time spent in Aspen and later in a large Florida estate owned by his millionaire stepfather Bill Koch, but opted for a more grounded route. Rather than following his father, Kevin Costner, into the entertainment industry, Liam pursued a professional career in real estate. He currently works with a high-end real estate business in Northern Palm Beach County, Florida, where he specializes in luxury houses and individual service.
By 2025, Liam’s net worth is expected to be between $1 million. This riches is most likely the result of a combination of his real estate revenue, a trust fund established by his father, and the influence of his wealthy family heritage. Despite his financial security and celebrity connections, Liam leads a low-profile life. He avoids public appearances, maintains his social media presence to a minimum, and focuses his concentration on his career. His decisions demonstrate a clear desire to create a life defined by personal effort rather than inherited celebrity.
FAQs
Who are Liam Costner’s parents?
Liam is the son of Kevin Costner, a Hollywood actor, and Bridget Rooney, a socialite and member of the Pittsburgh Steelers’ prominent Rooney family.
What does Liam Costner do for a living?
He is a real estate agent specializing in high-end houses in Florida.
Is Liam Costner married?
No, as of 2025, Liam is unmarried and has kept his romantic life discreet.
Does Liam have any sibling?
Yes, Liam has seven half-siblings: three from his father’s first marriage, three from his father’s second marriage, and one maternal half-sister from his mother’s marriage to William Koch.
What is Liam Costner’s net worth?
His estimated net worth is between $1 million and $8 million, derived from real estate and family trust funds.
Is Liam active on social media?
Liam has a minimal online presence and is not active on public social media networks.
Final Thoughts
Liam Costner, though born into Hollywood royalty and a billionaire stepfamily, has intentionally built a life far from the spotlight. Choosing a career in real estate over entertainment, he represents a rare blend of privilege and privacy. Grounded, driven, and discreet, Liam focuses on success through his own efforts while honoring the legacy of his well-known family.
