Mark-Douglas-Costner Mark-Douglas-Costner

Mark Douglas Costner Life Events, Death Details, & More

Mark Douglas Costner was the son of Sharon Costner and William Costner. He is also known for being the brother of Kevin Costner. Read ahead to know more about this celebrity family member’s life events, death details, bio, family, and more.

Quick Bio

Mark Douglas Costner was born on 17 January 1953 in Lynwood, Los Angeles, California, United States. He was one of the three sons born to Sharon Costner, a welfare worker, and William Costner, an electrician, and a utility executive. He had two siblings, Daniel Craig Costner, a businessperson, born in November 1950, and Kevin Costner, an actor, born on 18 January 1955. He had English, Irish, Scottish, German, and Welsh ancestry.

Life Events

As Mark Douglas Costner lived for only one day, he did not have anything to call life events. He passed away very young. He didn’t even understand who his parents were. He could not even see the world properly with his eyes wide open before he died. So, there is nothing known about his life events. Whereas, his family members are famous personalities. Read further to know more about them.



Mark Douglas Costner was born into a renowned Costner family, where everyone is popular in their respective careers. His father, William Costner, was an actor well-known for Biography (1987), Tin Cup (1996), and For Love of the Game (1999). On February 21, 2000, he took his last breath in Los Angeles, California, USA. His mother, Sharon Costner, was also an actress.

Kevin Michael Costner, his brother, has become a household name in the film industry. He is an American actor, producer, and director. He has received various accolades throughout his acting career which include two Academy Awards, three Golden Globe Awards, and a Primetime Emmy Award. He was not interested in studies, but he enjoyed playing football and other sports, writing poetry, and singing in the First Baptist Choir. He also used to take piano lessons. The 1962 film How the West Was Won inspired his love for Western films as a child. In 1981, he made his debut film in Sizzle Beach, U.S.A. He then played a minor role as Frat Boy in Night Shift (1982). He rose to prominence after starring in The Untouchables as federal agent Eliot Ness and in the leading role of the thriller No Way Out. His role as John Dutton on the Paramount Network original drama series Yellowstone earned him a Screen Actors Guild Award nomination and also a Golden Globe Award.

Death Details

Mark Douglas Costner, the second child of Sharon Costner, died one day after his birth on 17 January 1953. He left the world on 18 January 1953. His early death shocked his whole family, including his mom. A mother can bear anything but not the death of her children in front of her eyes. He had one elder brother Daniel at that time. Later, in 1955, his mother gave birth to his younger brother Kevin, three years after his death.


Mark Douglas Costner was the son of Sharon and William Costner. He is widely known as Kevin Costner’s brother. His brother has made a name for himself in the Hollywood industry.