Davy Jones -- lead singer of The Monkees -- died after suffering a heart attack this morning ... TMZ has learned.
An official from the medical examiner's office for Martin County, Florida confirmed with TMZ they received a call from Martin Memorial Hospital informing them that Jones had passed away.
A rep for the singer tells us Jones suffered a heart attack at his home this morning ... and was transported to a hospital where he was pronounced dead.
Jones is survived by his wife Jessica and 4 daughters from previous marriages. He was 66-years-old. Jones was married to Jessica Pacheco -- his 3rd wife.
Jones joined The Monkees in 1965 ... along with Micky Dolenz, Michael Nesmith and Peter Tork ... and together they churned out a bunch of hugely popular songs including 3 number 1 hits -- "Daydream Believer," "Last Train to Clarksville" and "I'm a Believer."
The group was initially cast by TV producers who wanted to create a scripted series about an actual rock n' roll band. But the group exploded, and Jones in particular became a Beatles-caliber heartthrob.
The Monkees songs were covered by huge bands like Coldpay, and Smash Mouth's version of "I'm a Believer" was famously featured in "Shrek."
Davy's last performance was on February 19th in Oklahoma -- the night before, he performed "Daydream Believer" and "It's Nice to Be with You" at the BB King Blues Club in NYC.