Hugh Hefner was in failing health for years, and he steadily deteriorated in the final months of his life.
This pic was taken in January … inside the Playboy Mansion. Although Hef was frail, using a walker to get around, he still hosted movie nights and invited people over.
TMZ broke the story … Hefner got a back infection 2 years ago and that became the linchpin for a variety of ailments that ultimately led to his death.
Hefner died Wednesday night at age 91.