, a member of the England 1966 World Cup winning side and who went on to become a cult hero in Ireland, has died aged 85, his family announced on Saturday.
Such was his achievement with Ireland that he was awarded the Republic's most distinguished award, honorary Irish citizenship in 1996.
"Leeds United are deeply saddened to learn club legend Jack Charlton passed away last night at the age of 85 following a long-term illness," read a Leeds statement.
"We are extremely saddened by the passing of Jack Charlton, brother of Sir Bobby and member of England's 1966 World Cup-winning team," they said.
"Yesterday was a very sad day. My grandad, Jack Charlton, died peacefully at home.
The 35-times capped Charlton managed at club level too but it was by turning Ireland from no hopers into a respected national side -- though with a distinctly no frills and direct style -- that he will be remembered.
Charlton secured the likes of Scotland-born Ray Houghton and England-born Andy Townsend and John Aldridge after unearthing some family links to Ireland.
"I hope you're behaving yourself and you're not out shooting and fishing and going to the pub during this lockdown," wrote Townsend.