EXCLUSIVE
Shout at the devil ... for the last time ... TMZ has learned, Motley Crue is calling it quits after 33 years.
The iconic heavy metal band -- famous for hits like "Kickstart My Heart" and "Girls Girls Girls" -- will be announcing their retirement at a 12 PM PST news conference inside Beacher's Madhouse Theater in Hollywood.
The stage is already set with headstones, symbolizing each of the band's members -- singer Vince Neil, guitarists Nikki Sixx and Mick Mars, and drummer Tommy Lee.
But before they pull the plug, we're told MC -- founded in 1981 by Nikki and Tommy -- will be going on one last tour ... more than 60 tour dates.
We're told the tour will start very soon. Alice Cooper is set to open for them.
