Hollywood is mourning the loss of Luke Perry, who passed away at the age of 52.

The actor, who's best known for his roles in Riverdale and Beverly Hills, 90210, died Monday morning (Mar. 4) at St. Joseph's Hospital in Burbank, California, after suffering a "massive stroke" last week, according to TMZ. "The family appreciates the outpouring of support and prayers that have been extended to Luke from around the world. No further details will be released at this time," his rep told the website.

Following news of his tragic death, Perry's friends and fans, as well as heartbroken celebrities, are paying him tribute. His Riverdale co-star Molly Ringwald, who played his character Fred Andrews's on-screen ex-wife, tweeted, "My heart is broken. I will miss you so much Luke Perry. Sending all my love to your family," while his 90210 castmate Ian Ziering penned an emotional tribute on Instagram, asking God to "please give him a seat close to you."

See how Hollywood is remembering Perry in the tweets below: