Read Leonardo DiCaprio's Touching Message to TV Dad and 'Role Model' Alan Thicke

Here is what DiCaprio said about Thicke on his personal page:

Alan was a devoted father, husband, friend and role model. He knew how to harness the power of the entertainment industry to be a positive influence in so many lives - including mine. I will be forever grateful for the opportunity I had to work with Alan early in my career. He had tremendous class, a huge heart, and he taught me and so many others the valuable lessons about humility and gratitude. I've seen him a number of times over the years and when Alan Thicke walked in the room, quite frankly, no one was cooler. I miss him already - my thoughts and prayers are with the entire Thicke family during this difficult time.

See How Alan Thicke's Sons, Carter & Robin, Honored Their Dad After His Death

DiCaprio isn't the only one from the show who pay homage Thicke on social media.

Kirk Cameron, who played Thicke's son Mike Seaver on 'Growing Pains,' took to his Instagram page to post his memories of working with his on-screen father.

"I spent Monday through Friday for seven important years with Alan Thicke as my 'TV dad,'" he captioned a photo of the two from the show. "I'm shocked and truly heartbroken today at the news of his death. Alan was a generous, kind and loving man. I am so blessed to have grown up with him. Chelsea and I send our love and prayers to his family tonight. We will cherish the memories... 'sharing the laughter and love.'"

Alan's "TV wife" Joanna Kerns also shared some kind words about Alan on Twitter, in response to actor Daniel Franzese tweeting his condolences to her.

Ashley Johnson, who played youngest daughter Chrissy Seaver on the sitcom, also shared a photo with Alan on social media, but later deleted it.

"There is a sacredness in tears...They are the messengers of overwhelming grief, of deep contrition, and of unspeakable love," she reportedly captioned the photo.