Social media lit up Tuesday night with tributes to legendary TV actor Alan Thicke, after news of his death began circling the web.

The 69-year-old’s death was first reported by TMZ, which said the Canadian-born actor died suddenly of a heart attack.

RELATED: Actor Alan Thicke dies suddenly at 69

Celebrities and fans subsequently took to Twitter to honor Thicke, best known for his role as the father on “Growing Pains.”

See some of the heartfelt tweets below.

America loved Alan Thicke. I'm so sad he's gone. Sending so much love to his family.

— Ellen DeGeneres (@TheEllenShow) December 14, 2016

I'm so sad to hear about the passing of Alan Thicke. RIP Alan. ?

— Lori Loughlin (@LoriLoughlin) December 14, 2016

Alan Thicke was always the nicest and happiest person in the room. Gone way too soon. Rest In Peace.

— Alyssa Milano (@Alyssa_Milano) December 14, 2016

To my @WifeSwap partner...I'll miss you. RIP Alan Thicke

— Gilbert Gottfried (@RealGilbert) December 14, 2016

So so sad to hear about the passing of #AlanThicke. Such a nice guy. My thoughts and prayers are with his loved ones. Rest in love. ??

— Olivia Munn (@oliviamunn) December 14, 2016

More sad shocking deaths for this year. RIP Alan Thicke.

— Jeremy Taggart (@Taggart7) December 14, 2016

Literally calling my parents to talk to them.... Life is too dang short. I just can't. #alanthicke

— Abby (@Misss_Abigail) December 14, 2016

Alan Thicke really was an icon. Sad loss - may he rest in peace

— Robert V. White (@rvwesquire) December 14, 2016

So sad about Alan Thicke, I loved growing pains ?

— karina monáe (@kaemonaae) December 14, 2016