The network plans to air a special tribute to St. John during the episode on Friday, a rep for CBS tells PEOPLE.
On Sunday, St. John was found dead at his home in the San Fernando Valley. He was 52.
According to the Los Angeles Police Department, a death investigation took place at around 2:05 p.m. for a possible alcohol overdose at the 2300 block of Morea Way. According toTMZ, which first reported the news, the actor’s body was found after one of his friends went to check on him at his home.
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Since the news of his death broke, fans, costars and family members have been sharing words of love and support.
“I’m raised an only child, but Kristoff is truly the closest thing to a brother and a brother’s love and a brother’s mentorship that I’ve ever known,” costar Shemar Mooretold PEOPLEabout St. John.
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St. John and Moore, 48, starred opposite each other onThe Young & the Restless, on which St. John played Neil Winters — since 1991 — and Moore played his half-brother, Malcolm Winters.
“He didn’t have to embrace me the way he did. When I came in and was trying to find my way and he saw how scared I was, he saw how nervous I was,” Moore said. “He saw my six pack and all that, but he just saw me and he embraced me like a brother. If he hadn’t embraced me, I would have never got my sure footing in the beginning days.”
St. John’s fiancée, model Kseniya Mikhaleva, shared her disbelief on social media as well, writing “So early…so early” on her Instagram Story with crying and heart emojis. “Why are you leave so early?” she wrote. “Why…you are always in my heart.”

CBS Television Network and Sony Pictures Television released a joint statement: “The news of Kristoff St. John’s passing is heartbreaking. He was a very talented actor and an even better person. For those of us who were fortunate enough to work with him on ‘The Young and the Restless’ for the last 27 years, he was a beloved friend whose smile and infectious laugh made every day on set a joy and made audiences love him. On behalf of the Y&R cast and crew, CBS and Sony Pictures Television, we offer our heartfelt sympathy to his family and loved ones, especially his two daughters, Paris and Lola.”
In 2017, St. John underwent psychiatric treatment after a reported scare regarding his mental health. According toTMZ, he threatened to kill himself with a gun and was placed under a 72-hour hold for psychiatric evaluation.
In a statement toEntertainment Tonightat the time, Mia blasted reports about the incident that led her ex to seek help.
St. John’s last episode ofThe Young and the Restlesswill air Wednesday at 11:30 ET on CBS.
source: people.com