Hollywood Mourns Late 'Young and the Restless' Star Kristoff St. John Following Actor's Death

LAS VEGAS, NV - JULY 14: Actor Kristoff St. John attends the 10th anniversary celebration of "The Beatles LOVE by Cirque du Soleil" at The Mirage Hotel & Casino on July 14, 2016 in Las Vegas, Nevada. (Photo by Gabe Ginsberg/Getty Images)

Young and the Restless star Kristoff St. John's death Sunday has shocked both fans and his fellow actors alike.

Authorities found St. John, 52, unresponsive Sunday afternoon, according to multiple reports. Us Weekly reports that paramedics were called to his Los Angeles home where he was pronounced dead at the scene. There are no reports of foul play.

According to Today.com, police said his death was the result of a possible alcohol overdose. The actor, who played Neil Winters on The Young and The Restless for more than 3 decades, had been reportedly struggling emotionally since the 2014 suicide of his son Julian. Just weeks ago, he posted about the 24-year-old's death, on his Twitter page.

The actor leaves behind 2 children and a fiance, Kseniya Mikhaleva, whom he had just asked to marry him a few months ago.

PASADENA, CA - APRIL 29: Actor Kristoff St. John (L) and daughter Paris St. John attend the CBS Daytime Emmy After Party at Pasadena Convention Center on April 29, 2018 in Pasadena, California. (Photo by Rodin Eckenroth/Getty Images)

See Mikhaleva and other tributes to the late star below:

How did it happen ??? How ??? Why did you leave so early ???? and left me alone ..... I can't believe ???????????????? you were everything to me .... you were a loving father, a loving man,.....how ???????????????????????????????????????????? love??we should doing a lot of things in future......

3,245 Likes, 1,311 Comments - Ksumik (@ksumik) on Instagram: "How did it happen ??? How ??? Why did you leave so early ???? and left me alone ..... I can't..."

GM Dawlings! It is with a very heavy heart that I wake up this morning to hear about the passing of my good friend @KristoffStJohn who I started off my acting career with on the Soap Operas #Generations & #Young&TheRestless and recently #AChristmasCruise WOW! Kristoff I will soo miss u my brotha! U were a true gentleman 4sho! #GONETOSOON #RESTINPARADISE my friend! #Blessed #Respect ????????????????‍♀️

11.7k Likes, 528 Comments - Vivica A Fox (@msvfox) on Instagram: "GM Dawlings! It is with a very heavy heart that I wake up this morning to hear about the passing of..."

I am still trying to process the news that this dear, dear man is gone. Forgive me if what I say here doesn't come together just right, but I have to say something about @kristoffstjohn. He deserves as loving a tribute as my early morning sadness can muster. #KristoffStJohn was love. Just pure and simple: love. He was the kind of person you meet who you feel like you've known your entire life. He had a gift for making people feel instantly at ease. He could immediately diffuse any nervousness you had. In my case, I was a ball of nerves because I was playing my first role on a soap opera ever...on #YandR which happened to be one of my FAVORITE soap operas...AND I was meeting HIM, who I had been a fan of most of my life. It could have been a scary, heavy moment. Kristoff made it LIGHT. In my character, Lois' subsequent visits to Genoa City, Kristoff was more of the same. Kind, encouraging, playful, fun and present. He saw me. He saw EVERYONE. He made time for everyone. He celebrated everyone. No matter who you were. He saw you. We spent our last lunch break together (the day this picture was taken) eating with a background actor who had been sitting alone in the commissary. Not on Kristoff's watch. He called her over to join us and the three of us had an amazing time. She got to geek out and ask every question she had and she and I both properly fan-girled over the gift of this lovely man. Kristoff made that moment happen. He saw her. More importantly he felt her. He didn't want her to be alone in a new place. He did the same for me. That is who he was a man. He was just GOOD. I am heartbroken to hear that he is gone. So heartbroken. #RIP dear heart. ❤️????

11.9k Likes, 562 Comments - Yvette Nicole Brown (@yvettenicolebrown) on Instagram: "I am still trying to process the news that this dear, dear man is gone. Forgive me if what I say..."

Alice Hunter on Twitter

My heart is with the family and loved ones of Kristoff St. John. Sending you strength and healing. May he be met with the comforting arms of his beloved son and may their gentle souls rest together for eternity ???????? https://t.co/9ZistnNghK

Stan Shaw on Twitter

This Breaks my Heart: "Young and the Restless" Star Kristoff St. John Sadly Found Dead. Kristoff played my Grandson on Roots2, I love this kid. He was a wonder kid, a great actor and an awesome man. I'd spoken with him recently. I'm just devastated! #RIP Beautiful soul, miss you!