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Alan Thicke was remembered by his friends, family and fellow actors in Hollywood. The "Growing Pains" star died Tuesday of a heart attack.

His son Robin Thicke told the Los Angeles Times his father was "the greatest man I ever met" and "always a gentleman."

"The good thing was that he was beloved and he had closure," Robin Thicke said. "I saw him a few days ago and told him how much I loved and respected him."

Alan Thicke's son Carter, who was with him when he had a heart attack, shared his thoughts on Twitter.

Today I lost my best friend and my idol, and the world lost one of it's finest. You are a legend and I love you Pops. Until next time. pic.twitter.com/ZQd2NZMTx4
— Carter Thicke (@CarterThicke) December 14, 2016

Kirk Cameron, who played Alan Thicke's son on "Growing Pains" said he was shocked by the news of his former co-star's death.

"I spent Monday through Friday for seven important years with Alan Thicke as my 'TV dad,'" Cameron said in a statement. "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."

I'm so sad to hear about the passing of Alan Thicke. RIP Alan. 😢
— Lori Loughlin (@LoriLoughlin) December 14, 2016

So sad is the passing of Alan Thicke. Such a good husband, father, brother, and friend. He will be deeply missed. Rest in peace dear Alan.
— bob saget (@bobsaget) December 14, 2016

RIP Alan Thicke. We skated side by side for years. Say hello to Gordie and The Rocket for me. Our Canadian Mounties sketch @jimmykimmel pic.twitter.com/YE5SiFRtsf
— Dave Coulier (@DaveCoulier) December 14, 2016

America loved Alan Thicke. I'm so sad he's gone. Sending so much love to his family.
— Ellen DeGeneres (@TheEllenShow) December 14, 2016

To my @WifeSwap partner...I'll miss you. RIP Alan Thicke
— Gilbert Gottfried (@RealGilbert) December 14, 2016

Saddened over the loss of my friend Alan. Condolences to his family.
— William Shatner (@WilliamShatner) December 14, 2016

RIP to my brother Alan Thicke. The world has lost an icon. 🙏🏾 pic.twitter.com/zIK0hzjihK
— Russell Simmons (@UncleRUSH) December 14, 2016

Thicke's TV daughter Tracey Gold told FOX411, "I am in absolute shock and so unbelievably sad... I looked up to Alan admired him greatly. I always listened to his advice and wisdom. He was so kind and warm and always made me laugh... I am so honored to have been his daughter for seven beautiful years."

RIP Alan Thicke who was a great talent and a genuine person. #everyonesdad
— Dane Cook (@DaneCook) December 14, 2016

RIP Alan Thicke. I grew up watching him and got to know him through Robin. He was always so kind to me. So sad to hear about his passing.
— John Legend (@johnlegend) December 14, 2016

Had the pleasure of meeting Alan Thicke and his amazing wife Tanya a few years back.. my thoughts and prayers are with his family. RIP 😔
— Demi Lovato (@ddlovato) December 14, 2016

So sad #AlanThicke always made me laugh we recently worked and laughed together "live for today it can be gone tomorrow" Goodbye Alan!
— David Hasselhoff (@DavidHasselhoff) December 14, 2016

So saddened to hear of the passing of my friend #AlanThicke Sending my 🙏 2 his loved ones! ❤️️#RIP #GrowingPains pic.twitter.com/1YNRHpLjzq
— Marie Osmond (@marieosmond) December 14, 2016

Fox News' Blanche Johnson contributed to this report.