It didn't take long for his fans, colleagues and star admirers to hear and mourn the untimely passing, and while not all his fellow Monkees have yet to release statements on their bandmates' death, Twitter quickly exploded with an outpouring of memories and tributes to the singer.
Here's what the famous mourners had to say…
Bandmate and costar Micky Dolenz posted the following on his Facebook page, "Can't believe it...Still in shock...had bad dreams all night long. My love and prayers go out to Davy's girls and family right now..."
Also among the first to express their sadness was Boyce and Hart, the songwriting duo who worked extensively with the Monkees, most notably penning "Last Train to Clarksville' and the Monkees theme.
"This is the saddest news ever," they wrote on their Facebook page. "We have no words to express how we are feeling…condolences and loving prayers for his family, friends and his fans; the world has lost a dear man, loving husband and father; a great talent.
"Thank you for your loving comments; we are saddened beyond words; loving prayers and sympathy for his family, friends and fans…a great talent and good friend lost today."
Fellow stars were quick to follow suit, tweeting out their condolences:
Questlove: "Damn. Davy Jones is gone. I loved the Monkees."
Holly Robinson Peete: "Sorry to hear this. I will never forget that great Brady Bunch ep with him."
Ralph Macchio: "Sad news—RIP Davy Jones. My wife's childhood crush…"
Gilbert Gottfried: "True…David Bowie's real name is David Jones. That's why he had to change it to Bowie. R.I.P. Davy Jones."
Chuck Wicks: "Sat next to Davy Jones at an award show couple years back. Such a great guy.. RIP Davy Jones."
Shannon Elizabeth: "So sad-I was just at an event w/him #rip #davyjones #monkees"
Christopher Gorham: ":( RIP."
Kevin Pollack: "Today officially sucks now. RT Monkees singer Davy Jones dead at the age of 66."
Eric Appel: "RIP Davy Jones. The Monkees were my first favorite band, my first favorite TV show, and the first live concert I ever saw."
Wil Wheaton: "Oh my god Davy Jones died at 66. That's way too young."