Liam Costner Bio: Inside the Life of Kevin Costner’s Son

Liam Costner is the 27-year-old son of famous American actor, Kevin Costner, and the stepson of American billionaire business mogul William Koch. He is one of Kevin Costner’s seven children from three different women.

Kevin Costner ranks as one of the greatest actors of his generation, but he will have you know that his biggest achievement in life is fatherhood. The two-time Oscar winner is a father of seven and, despite his busy career, makes time for each of his kids.

He regularly gushes about them and makes sure to let them know that there is enough love to go around for all of them. The kids are all thriving in and out of the spotlight, and one of them is Liam Timothy Costner.

Liam timothy Costner is the product of a relationship that the actor embarked upon following his divorce. Though he initially contested fatherhood and demanded a paternity test, he, however, stepped up to his responsibilities once his doubt was cleared. Liam has thrived alongside his siblings and is now a realtor in California.

Profile Summary of Liam Costner 

  • Full name: Liam Timothy Costner
  • Date of birth: 15th of November 1996
  • Age: 27 years old
  • Father: Kevin Costner
  • Mother: Bridget Mary Rooney Koch
  • Siblings: seven half-siblings, including Kaitlin Koch
  • Education institutions attended: N/A
  • Occupation: N/A

Liam Timothy Costner is One of Seven Children Born to Oscar-Winning Actor Kevin Costner

Liam Costner is 27 years old as he was born on the 15th of November 1996. He has American nationality and German, Irish, Scottish, Welsh, and English ancestry. Liam Costner is one of seven children born to two-time Academy Award-winning actor, Kevin Costner. The senior Costner fell in love with acting during his college days and made his film debut in the 1981 film Sizzle Beach, U.S.A. He subsequently built his profile with several other movie appearances until 1990, which saw the release of the critically-acclaimed Dances with Wolves.

Liam Costner
Image Source

Dances with Wolves revolved around a Union Army lieutenant, John Dunbar, who travels to the American frontier searching for a military post. Kevin Costner not only played the lead role of John Dunbar but also directed the movie. All of his hard work paid off as he won the Academy Awards for best actor and best picture. It has been more than three decades after Dances with Wolves, and Kevin Costner’s career continues thriving. He has featured in unforgettable movies such as The Bodyguard, A Perfect World, The Company Man, and Rumour Has It. He has been equally successful on TV, starring in hit shows such as Hatfields & McCoys and Yellowstone.

His Mother is Pittsburgh Steelers’ Heiress, Bridget Rooney

Liam Costner’s mom is a lady named Bridget Rooney. She is not as famous as Kevin Costner, but she does have some impressive origins. Rooney was born on the 26th of April 1962. Her mother’s name is June Rooney, while her father is Tim Rooney. Her paternal grandfather is the late Art Rooney, the man who founded and grew the Pittsburgh Steelers into one of the most successful franchises in NFL history.

Liam Costner
Bridget Rooney and William Koch (Image Source)

Bridget Rooney grew up in California and completed her high school diploma within normal time. Afterward, she obtained an MBA from American University. Bridget Rooney has grown up to become a socialite and philanthropist. The Pittsburgh Steelers are currently valued at more than $3 billion, meaning that she is a multi-millionaire, seeing as she has some share of that fortune. The lady has no need for a day job, but she is reasonably occupied. She also has at least one acting credit to her name, and this came in the 2011 movie, Zombie or not Zombie.

Liam Costner’s Parents Briefly Dated around 1995 and Welcomed him in 1996

Kevin Costner and Bridget Rooney first began dating around 1995 following the dissolution of the actor’s marriage. Kevin was previously married to his college sweetheart named Cindy Silva. The marriage lasted for 16 years and produced three children, namely Annie, Lily, and Joe. However, he and Cindy had issues due to his busy schedule, and they ultimately separated and formally divorced in 1994. This must have taken a toll on Kevin, but he decided to give love another chance when he bumped into Rooney in 1995.

A young Liam with his father, Kevin (Image Source)

They dated for some months before they separated. Rooney then gave birth to their son, Liam Timothy, in 1996. She gave the boy her grandfather’s name as his middle name but made sure to give him ‘Costner’ as his surname. Kevin Costner wasn’t so agreeable. He initially denied being Liam’s father and asked for a paternity test. It was only when the test confirmed that he was truly Liam’s dad that he acknowledged him as his son.

His Mom Later Married Billionaire Businessman Bill Koch, and He Grew Up With Them

Thanks to the circumstances of his birth, Liam Costner largely grew up with his mom. However, his biological father made an effort to be present in his life. He set up a trust fund for him. He also made sure to see him occasionally, although not regularly. The young boy was thus able to have a good life, and for a significant period, it was just him and his mother going it alone. However, by the time he was nine, his mother remarried billionaire businessman, sailor, and collector, Bill Koch of the Koch industries.

This was in 2005, and Liam Timothy grew up in significant affluence, thanks to his father’s trust fund, his mother’s wealthy family, and his stepfather’s wealth. Even more importantly, his mom, step-dad, and biological dad lavished enough attention on him, which made him thrive. For his high school education, Liam Timothy studied at an elite high school in Connecticut, where he excelled in football. He was a star athlete and played linebacker, running back punter, and kicker on the school team.

Liam and his mom, Bridget (Image Source)

Liam Costner is now a Real Estate Agent and Goes by the Name Liam Rooney Koch

Going by his age, Liam Costner left high school around 2014. He most likely attended college and would have graduated from there as well. The young man has lived his life out of the spotlight and currently works as an associate realtor at Frankel Bell Realty Group. The company focuses on the Northern Palm Beach County area and uses “edge marketing and technology to make the buying, selling, and renting of homes cutting edge and seamless for clients.”

Liam Costner has not followed his biological father’s footsteps into acting. He has no discernible acting role to his credit, and there is no talk of any upcoming one. Therefore, only time will tell if Liam Costner would ever be as successful as his father, Kevin Costner. Of course, he didn’t necessarily be an actor to achieve that. He can also do wondrous feats in other fields of human endeavor.

He Has Seven Half Siblings and Four Step-siblings 

Kevin Costner with his youngest children (Image Source)

Liam Costner has a total of six half-siblings from his father’s side. They are Annie (b. 1984), Lily (b. 1986), Joseph (b. 1988), Cayden (b. 2007), Hayes (b. 2009), and Grace (b. 2010). Annie is a Brown graduate and runs her production company known as Sound Off Films. She has worked with Katy Perry, Red Bull, and ESPN. On her part, Lily is an actress and has starred in movies such as The Postman, The Baby-Sitters Club, and Black or white.

Joseph has also tried his hands at acting, appearing alongside Lily in The Postman. His other acting credits include Tin Cup, and he is also credited as a member of the sound department on the short film, The Oasis. On his maternal side, Liam Costner has a younger half-sister named Kaitlin Koch, born in 2006. Asides from his half-siblings, Liam Costner also has a total of four step-siblings as a result of his stepfather. They include Wyatt, Charlotte, Robin, and William Koch.

Key Facts

  1. Who is Liam Costner’s father and why did he initially deny him? Liam Costner’s father is the Hollywood actor, director, and producer Kevin Costner. Initially, Kevin denied Liam as his son until a paternity test confirmed that he was indeed Liam’s biological father.
  2. What is the relationship like between Liam Costner and his father, Kevin Costner? Although their relationship was initially strained due to Kevin denying his paternity, over time, it has stabilized. Despite only having occasional visits from his father, Liam was reportedly raised with love and care. Kevin has also publicly stated that all of his children are equally loved.
  3. Who is Liam Costner’s mother? Liam Costner’s mother is Bridget Rooney. She was in a brief relationship with Kevin Costner, which resulted in Liam’s birth. Rooney later married American billionaire businessman William Koch.
  4. What was Liam Costner’s upbringing like? After his mother married William Koch, Liam moved into a large residence with his stepfather and stepsiblings from Koch’s previous relationships. He grew up in a loving environment, although not always with his biological father.
  5. Does Liam Costner have any siblings? Liam is the only child of Kevin Costner and Bridget Rooney. However, he has six step-siblings. Three older step-siblings, Annie, Lily, and Joseph, are from his father’s first marriage, and three younger step-siblings, Cayden, Hayes, and Grace, are from his father’s second marriage. He also has a stepsister, Kaitlin, from his mother’s marriage to William Koch.
  6. Did Liam Costner follow in his father’s footsteps and enter the entertainment industry? No, unlike some of his step-siblings, Liam did not pursue a career in the entertainment industry. Instead, he is reportedly involved in real estate.
  7. How old is Liam Costner? Liam Costner was born on November 15, 1996, which makes him 27 years old.
  8. What is known about Liam Costner’s personal life? Not much is publicly known about Liam’s personal life, as he tends to keep it private. Although there are some online photos suggesting he might be married, it’s not officially confirmed.
  9. What is Liam Costner’s net worth? It is difficult to calculate Liam’s exact net worth as his work as a real estate agent is kept private. However, being the son of a wealthy actor and stepson of a billionaire, it is believed he has inherited a substantial fortune from both.
  10. Is Liam Costner a U.S. citizen? Yes, Liam Costner was born in the United States and holds U.S. citizenship.
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