Celebrities react to Alan Thicke's death

Alan Thicke, host of Thicke of the Night, smiles as he answers questions during an interview on Thursday, Sept. 10, 1983 in his office at Metro Media Square, Los Angeles. (Colin Crawford/AP Photo)

Alan Thicke's death sparked an instant outpouring of mourning and support on social media. Thicke, who starred on Growing Pains, died on Tuesday. He was 69 years old.

His son, singer Robin Thicke, shared this message on Instagram.

Thicke's first wife Gloria Loring, Robin Thicke's mother, expressed her grief on Facebook.

His former daughter-in-law, Paula Patton, shared a quote from Mother Teresa.

Thicke will be deeply missed and here's how other celebrities reacted to his death.