Adam Sandler is mourning his Grown Ups co-star, Alec Musser.

The 57-year-old actor shared a heartbreaking tribute in memory of his former castmate the day after his friend passed away at the age of 50 at his home in California.

‘I loved this guy,’ he wrote in a caption alongside a photo of Musser in their 2010 comedy drama. ‘Cannot believe he is gone.’

The five-time Emmy winner — who shared a sweet exchange on Instagram with Drew Barrymore just days earlier — gushed about the late fitness trainer and said he was ‘such a wonderful, funny good man.’

‘Thinking of Alec Musser and his family and sending all my love,’ he continued. ‘A true great sweetheart of a person.’

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Adam Sandler is mourning his Grown Ups co-star, Alec Musser

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The 57-year-old actor shared a heartbreaking tribute in memory of his former castmate the day after his friend passed away at the age of 50 at his home in California

Late actor Alec Musser in the trailer for ‘Grown Ups’ from 2010

On Saturday, Musser’s fiancée, Paige Press, confirmed that the soap star died at their home in Del Mar, but his cause of death has not yet been revealed.

Earlier on Saturday, it was reported the soap star, most well known for All My Children, died the night before at his home in Del Mar, California.

His uncle also confirmed the tragic news to TMZ but also did not reveal his cause of death.

Previously, Musser starred in Grown Ups as the Water Park Stud.

Although Musser worked with Sandler in the 2010 film, he did not appear in the sequel released in 2013.

Musser also starred as Del Henry on the long-running television series All My Children.

In July 2005, he was awarded the role after he won the second season of the SOAPnet original series I Wanna Be a Soap Star.

He appeared on a total of 43 episodes until he exited the drama series in 2007.

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Alec Musser has reportedly passed away on Friday night at the age of 50; seen in 2006

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His fiancee confirmed his death on Saturday

He had also appeared in Desperate Housewives, Road to the Altar and Rita Rocks.

An avid athlete since he was a child, the New York native was also a fitness model.

After graduating from the University of San Diego, he started working with the professional ski patrol at Mammouth Mountain.

It was there where he was scouted by an agent for his first modeling job at Abercrombie and Fitch.

His many other modeling credits include GQ, Cosmopolitan, Men’s Health, Speedo and Target.

After landing national commercials, it was then he auditioned for I Wanna Be a Soap Star.

The reality TV series would would lead to his acting debut role in All My Children.

In recent years, he was not active in Hollywood but maintained a presence on social media as he often posted often about his active lifestyle and fitness journey.

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The soap star, most well known for All My Children, died of an undisclosed cause at his home in Del Mar, California as confirmed by his fiancée, Paige Press; seen in 2010

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His last Instagram post was of himself partaking in one of his favorite outdoor activities and surfing four days ago

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The couple got engaged last year after six years of dating

His last Instagram post was of himself partaking in one of his favorite outdoor activities and surfing four days ago.

In the comments section, many of his fans left touching tributes remembering his memory and expressing their sympathies to his loved ones.

He is survived by his fiancé — with whom he has been in a relationship with for over six years.

They recently got engaged last year and she posted a series of throwback photos on her Instagram Story in a tribute to Musser.

‘RIP to the love of my life,’ she wrote over a ‘vision board for 2023’ on which she had posted photos of him and engagement images. ‘I will never stop loving you.’

Over a photo of them at a red carpet appearance together, she wrote: ‘Today is the worst day of my life. We were so happy.’

‘You were the best fiancé I could of [sic] ever asked for,’ she posted alongside a photo of him surprising her with matching Mercedes-Benz G-Class SUVs. ‘I don’t even think I can drive my g wagon anymore.’

She also shared a photo of them enjoying a night out together from the beginning of their relationship.

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‘RIP to the love of my life,’ Page wrote over a ‘vision board for 2023’ on which she had posted photos of him and engagement images. ‘I will never stop loving you’

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She also shared a photo of them enjoying a night out together from the beginning of their relationship

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‘You were the best fiancé I could of [sic] ever asked for,’ she posted alongside a photo of him surprising her with matching Mercedes-Benz G-Class SUVs. ‘I don’t even think I can drive my g wagon anymore’

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‘Rue will never stop loving her dad,’ she wrote over a photo of Musser driving while holding their dog when she was a puppy

‘We look like babies here,’ she wrote over the throwback photo. ‘This was 6 years ago.’

She also shared snaps of them ice skating and in a private jet with their dog Calle.

Press also posted a picture of them hiking at golden hour with their dog and at the beach during sunset.

‘Rue will never stop loving her dad,’ she wrote over a photo of Musser driving while holding their dog when she was a puppy.

‘You were the best dog dad,’ she captioned a photo of Musser with their two dogs and alongside a brokenhearted and crying emoji. ‘RIP 4/11/71 – 1/13/24.’

She also shared a photo of her engagement ring presumably from the moment he proposed to her on the beach last year.

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‘You were the best dog dad,’ she captioned a photo of Musser with their two dogs and alongside a brokenhearted and crying emoji. ‘RIP 4/11/71 – 1/13/24’

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She also shared a photo of her engagement ring presumably from the moment he proposed to her on the beach last year

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She also shared a photo of one of his modeling photos with the caption: ‘The best model @abercrombie ever had’

She wrote: ‘I am never taking off my ring. I love you forever.’

Press also posted a snap of a book she had gifted him at one point titled: ‘What I love about Alec by Paige’.

She also shared a photo of one of his modeling photos with the caption: ‘The best model @abercrombie ever had’.

She also reposted a tribute shared by their friend Jamie Corroon.