• Actor Luke Perry has died after suffering a “massive stroke.”
• He was best known for playing heartthrob Dylan McKay on “Beverly Hills, 90210” and Archie Andrews’ dad, Fred, on “Riverdale.”
• His co-stars and celebrity friends are mourning him online.

Monday morning, representatives confirmed that “Riverdale” and “Beverly Hills, 90210” star Luke Perry died at 52 after suffering a “massive stroke.”

"He was surrounded by his children Jack and Sophie, fiancé Wendy Madison Bauer, ex-wife Minnie Sharp, mother Ann Bennett, step-father Steve Bennett, brother Tom Perry, sister Amy Coder, and other close family and friends,” a representative told INSIDER in a statement. “The family appreciates the outpouring of support and prayers that have been extended to Luke from around the world, and respectfully request privacy in this time of great mourning.”

The actor’s death has blindsided both fans new and old, as well as longtime co-workers and celebrity fans. Some of his famous friends took to social media to mourn and remember the star.

Busy Philipps reacted to the news with a throwback photo

Selma Blair called him 'one of the kindest men' she’d ever met

“I did not have the pleasure of really knowing him but we all wanted to,” she wrote.

Ashley Tisdale reminisced on working with him on '90210'

“I had a crush on him for so long and getting to work with him was a dream come true. I just remember him being a super humble and really nice guy,” she wrote.

Josh Whedon remembered meeting him for the 'Buffy' movie

“I asked if he’d ever seen ‘Near Dark’ and he gave me a look of HOW DARE YOU SIR and I knew we’d get along,” he tweeted.

Perry’s on-screen 'Riverdale' wife Molly Ringwald said her 'heart is broken'

“I will miss you so much,” she tweeted. “Sending all my love to your family.”

Patricia Arquette called Perry an 'incredible friend.'

“Irreplaceable beautiful and kind human being, incredible friend, generous actor and adoring father to Jack and Sophie and loving partner to Madison,” she tweeted, “we are all heartbroken. You are the love and you are the light.”

'Big Bang Theory' star Mayim Bialik mourned him with a throwback photo.

'Jane the Virgin' star Justin Baldoni expressed his shock.

“This can’t be real,” he tweeted. “Luke is one of the most kind, down to earth and hard-working men in this business. Gutted for his family, and friends. He was so young. Damnit. Praying.”

'Buffy' star Seth Green reminisced on working with Perry

“We met very young,” he tweeted. “I witnessed the grace with which he became a pop icon & parent. He’s been an awesome example of how to stay decent in a swirl of crazy.”

Leslie Grossman shared a funny anecdote

“When I was lucky enough to work with Luke Perry I told him about the pillow of his face I used to sleep with and he yelled ‘You are such a weirdo!’ at me and it was the best,” she tweeted.”

'Beverly Hills, 90210' co-star Ian Ziering shared a sweet message

“I will forever bask in the loving memories we’ve shared over the last thirty years,” he tweeted. “May your journey forward be enriched by the magnificent souls who have passed before you, just like you have done here, for those you leave behind.”

The 'Riverdale' writers room mourned Mr. Andrews

“You were a joyful and vibrant soul,” the account tweeted. “You will be missed but most certainly your legacy will be remembered forever.”

'Beverly Hills, 90210' co-star Christine Elise McCarthy shared her shock

“I have no words beyond saying he was a truly kind gentleman,” she wrote. “He will be mourned and missed by everyone who knew him and the millions who love him.”

Actor Josh Gad expressed his condolences

“Heartbreaking. Absolutely heartbreaking,” he tweeted.

Olivia Munn mourned her 'first crush'

“Luke Perry was my 1st crush. Eh, more like obsession (I wore pins w his face on them to school,” she tweeted. “I used to dream of making it to LA just to meet him. I never got to, but I've always heard he was a really great person.”

Writer Roxane Gay tweeted her sadness

“RIP Luke Perry aka Dylan McKay,” she wrote. “I loved Dylan very much in high school.”

Co-star Marisol Nichols shared a photo of herself and Perry

She said she had no words at the moment. 

We will update this article as more celebrity reactions come in.

SEE ALSO: 

FOLLOW US: INSIDER is on Facebook

Join the conversation about this story »

NOW WATCH: How the sound in 'A Star is Born' was layered and designed