“Sleepaway Camp” star Jonathan Tiersten has died. He was 60.

The actor passed away at his New Jersey home last week, his brother, William Tiersten, told TMZ on Tuesday.

The cause of death is under investigation.

Jonathan got his start in the entertainment industry in 1981 when he appeared in an episode of the TV drama “Another World.”

His breakout role was as Ricky Thomas in the 1983 Robert Hiltzik-directed horror film, “Sleepaway Camp.”

The horror film follows a series of murders that occur at a teenage summer camp.

Jonathan also reprised his role in the 2008 sequel “Return to Sleepaway Camp.”

Additionally, the horror star was known for portraying John Doesy in the 2012 thriller “The Perfect House,” which won him three best actor awards at several film festivals.

He continued his scary movie streak as Manny in the 2014 film “Redemption.”

Jonathan’s most recent roles included the 2019 movie “Lake of Shadows,” 2021’s “Toilet Zombie Baby Strikes Back” and 2022’s “Last American Horror Show: Volume II.”

Before his death, he portrayed Gene in the 2022 L.C. Holt-directed film “Time’s Up.”

Jonathan was active on his social media leading up to his tragic death and shared a sweet photo of his son on April 23.

“To have my son is something I cannot define,” he captioned the snap.

Jonathan often posted photos with his son, selfies and videos of himself playing the guitar.

Several fans rushed to his comments to give their condolences, with one writing, “RIP thank you for the memories.”