On Wednesday, Luke Perry was hospitalized after suffering a stroke in his California home.
While we wait to hear more about his condition, his co-stars (both current and former) are sending messages of support on social media.
Lili Reinhart shared this on-set photo with the caption, "Thinking of you, Luke. And praying for your safe recovery."
Cole Sprouse shared a photo that he likely took alongside a simple message of, "Love you bud."
Skeet Ulrich shared this poolside photo and is "waiting for ya, brotha!"
Molly Ringwald (aka Luke's TV wife on Riverdale — she and Luke play Archie's parents!) sent her well-wishes via Twitter.
Mädchen Amick shared this gorgeous monochrome portrait with the words "Love you Luke" as her caption.
Marisol Nichols shared a selfie and said she was "thinking of this amazing man."
And Casey Cott shared a photo of the two at a CW event with the caption, "Love you my brother."
But the support didn't end with his current Riverdale co-stars — his former Beverly Hills, 90210 cast sent messages of love, too.
Shannen Doherty, who played Brenda on 90210, has recently gone through a health scare herself. She sent good vibes to her former TV boyfriend on Instagram, saying, "Holding you tight and giving you my strength. You got this."
And Ian Ziering, who played Steve Sanders on the show, shared this vintage throwback photo and said a prayer for Luke's speedy recovery.