The father of Melbourne underworld figure Carl Williams has died.

George Williams has reportedly died in hospital after suffering a heart attack at the age of 69.

He was allegedly setting up a television set when he collapsed in his Broadmeadows property, the Herald Sun reports.

George was jailed for four-and-a-half-years in November 2007 after pleading guilty to teaming up with his son to smuggle almost five kilograms of amphetamines.

He spent the final years of his life fighting a $700,000 bill from the Australian Tax Office.

George’s death comes six years after his son’s brutal murder at the maximum-security Acacia unit at the Barwon prison.

Carl, who was 39-years-old at the time, was struck on the head with part of an exercise bike by fellow inmate Matthew Johnson.

He was serving a life sentence for the murders of Jason Moran, Mark Mallia and Lewis Moran.

– TiVi Tuan-san