Searxng/Jonathan Tiersten Movie Jonathan Tiersten, star of cult horror classic Sleepaway Camp, dies at 60. Cause under investigation. May 7, 2026 AceShowbiz - Jonathan Tiersten, renowned for his role in a beloved Eighties horror cult classic, has passed away at the age of 60. The news was confirmed by his brother William, who revealed that the medical examiner is currently investigating the cause of death after the actor was found in his New Jersey home last week. Jonathan Tiersten first gained recognition in 1983 when he starred as Ricky Thomas in Sleepaway Camp.