43. That's no age at all. Thinking of Jonas and the rest of the family.
Their story
Christian Cousins was an American former child actor who, with his identical twin brother Joseph, played the role of Dominic in the 1990 comedy Kindergarten Cop opposite Arnold Schwarzenegger, and Bobby Ewing in the television soap Knots Landing. He died on 20 October 2026, at the age of 43, after…
Christian Cousins was an American former child actor who, with his identical twin brother Joseph, played the role of Dominic in the 1990 comedy Kindergarten Cop opposite Arnold Schwarzenegger, and Bobby Ewing in the television soap Knots Landing. He died on 20 October 2026, at the age of 43, after a serious illness with liver disease.
Christian and Joseph, known as Joey, were born in March 1983 in Orange County, California. Like many twins in the business, they were cast together so that productions could share one part between two children and stay within the strict limits on how long a minor may work on set. Their first role came at the age of five, in an episode of Highway to Heaven.
From 1987 to 1992 the twins shared the part of Bobby Ewing in the CBS prime time soap Knots Landing, appearing in nearly 60 episodes. In 1990 they played Dominic, one of the pupils of Schwarzenegger's undercover detective, in Ivan Reitman's Kindergarten Cop, a box office hit that became a lasting family favourite. They also appeared in the 1991 horror comedy Critters 3, remembered as the film debut of Leonardo DiCaprio. Their last screen work came in 1995, after which both brothers stepped away from acting.
In 2020 Christian took part in a 30th anniversary Kindergarten Cop reunion organised by Yahoo Entertainment, which Schwarzenegger joined as a surprise. He recalled that the twins had met Reitman and Schwarzenegger early in casting and got the part, but were still invited to the later rounds so the filmmakers could see how all the children worked together.
Outside the screen, Christian lived largely out of public view. His half brother Jonas Roeser, who shared the twins' biological father but grew up in Washington state, said he only came to know Christian and Joey in college, having first watched them on television as a boy.
Roeser announced Christian's death on Instagram on 22 October 2026, writing that he had been very sick with liver disease and that it brought him comfort to believe Christian was now in heaven with his mother, free from pain. He remembered him as a character, full of passion and energy, with big stories and even bigger dreams. The news reached entertainment outlets in November, where fans recalled watching the twins on Knots Landing and in Kindergarten Cop.
Biography adapted from TMZ, Page Six, Yahoo Entertainment and UNILAD (13 November 2026), statement by Jonas Roeser.

Didn't realise there was a half brother involved, sad all round.