THE DEPARTED!

Jack Nicholson's sparks dementia bizarre behavior fears for icon, 86

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AGING recluse Jack Nicholson has turned into a sloppy, sorrowful shadow of his former leading-man self — triggering the fears of pals and a medical expert the 86-year-old Something’s Gotta Give star is spiraling into a dementia nightmare!

Shocking April 13 photos — the first images of the beloved icon taken in nearly two years — show the three-time Oscar winner on a balcony looking a disheveled, unwashed mess while staring wildly into space.

The Shining actor has spiraled from Hollywood’s most famous bachelor to an overweight, out-of-shape hermit in recent years, and seemed to be twitching uncontrollably before using a handrail to lean on while standing up, according to witnesses.

Sources confide there are growing fears the homebound, 5-foot-10 Chinatown actor, who at one point smashed the scales at 360 pounds, is progressively losing his mental faculties and is on his last legs.