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
| 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 career 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
Costner was born in Indiana, USA, to Hollywood actor Kevin Costner and Bridget Rooney, a member of the famous Rooney family. His early life was influenced by his parents’ brief relationship, which ended before his birth, yet both played significant roles in his upbringing. Kevin Costner initially ordered a paternity test, which confirmed their biological tie, and then set up a trust fund to help Liam in the future.
Liam grew up in a blended family that includes several Costner siblings from his father’s previous marriage. He grew up in Aspen, Colorado, away from the Hollywood glare, and attended Oxbridge Academy. His studies focused on business and finance, which aligns with his current career in real estate. Despite his legendary family history, Liam prefers to keep a low profile and lead a life outside of the entertainment industry.
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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 (1984): Actress and Model
- Lily Costner (1986): Actress and Mental Health Advocate
- Joe Costner (1988): Actor and Musician
- Cayden Costner (2006): Child Actor
- Hayes Costner (2009): Child Actor
- Grace Costner (2010): Private Individual
- Kaitlin Koch: Maternal half-sister from Bill Koch and Bridget Rooney
Liam Costner and His Father Kevin Costner: Their Relationship
His relationship with his father has been complex and distant. Kevin was initially unwilling to recognize fatherhood, thus a paternity test was required. Following confirmation, he established a trust fund but remained minimally involved in Liam’s upbringing. Their interactions have been intermittent, with Kevin Costner paying visits but not being consistently present. Liam respects his father but focuses on forging his own path.
Liam Costner and His Stepfather Bill Koch: Their Relationship
Bill Koch, a billionaire businessman and member of the Koch family, married Bridget Rooney in 2005, becoming Liam Costner‘s stepfather. Liam lived in Koch’s lavish 36,000-square-foot estate filled with valuable artwork. His upbringing in this opulent environment helped shape his worldview and access to opportunities. He also has a maternal half-sister, Kaitlin Koch.
Liam Costner’s Education and Career Preparation
Liam Costner attended Oxbridge Academy in West Palm Beach, Florida, a school known for rigorous academics. He focused on business and finance, aligning with his eventual career in real estate. After secondary school, Liam pursued further studies in finance and business, giving him a foundation for roles requiring market knowledge and negotiation skills.
Liam Costner’s Career as a Real Estate Agent
Liam Costner now works with the Frankel Bell Group, specializing in high-end homes in Northern Palm Beach County, Florida. His client-focused, discreet approach has earned him credibility in the industry. He also worked for Aspen Skiing Company and became a producer at NFP in 2022, showing his adaptability.
Liam Costner’s Relationship Status and Private Life
As of 2025, Liam Costner is unmarried. Unlike many children of celebrities, Liam has avoided public dating. His minimal social media presence and low-key lifestyle reflect his preference for privacy. He channels his focus toward professional goals rather than public appearances.
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Inside Liam Costner’s Wealth and Way of Life
Liam Costner lives quietly, avoiding the fame associated with his family. Although he grew up surrounded by wealth, including estates in Aspen and Florida, he prefers a more grounded lifestyle. His net worth in 2025 is estimated at $1 to $8 million, sourced from real estate, trust funds, and family assets.
Liam Costner’s Real Estate Influence in Palm Beach
Beyond being just another luxury home dealer, Liam Costner has grown into a discreet yet influential figure in Palm Beach real estate. Working with clients seeking multimillion-dollar estates, he blends local insight with elite networks thanks to his upbringing. His calm, methodical approach sets him apart from flashy agents, earning trust among high-net-worth individuals.
FAQs
Who are Liam Costner’s parents?
Kevin Costner and Bridget Rooney
What does Liam Costner do for a living?
He is a real estate agent in Florida.
Is Liam Costner married?
No, Liam is currently single.
Does Liam have any siblings?
Yes, he has seven half-siblings.
What is Liam Costner’s net worth?
Estimated between $1 million and $8 million.
Is Liam active on social media?
He has minimal social media presence.
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.
