Jack Charlton, former manager of the Irish football team during Italia '90 and USA '94 World Cups, has passed away at the age of 85.

A former player himself for Leeds United from 1950 until his retirement in 1973, Charlton had a storied career before beginning his management career. The elder brother of Bobby Charlton, Jack was also a member of the England team that won the World Cup in 1966 against West Germany.

Retiring from playing football in 1973, Charlton's career in management was equally as storied. He was voted Manager of the Year in his first season as manager of Middlesborough and stayed there for four years, before he moved on to Sheffield Wednesday where he stayed for six years, leaving the team in 1983 to take over briefly as caretaker manager for Middlesborough and one season at Newcastle.

Charlton took on the Irish job in 1986, leading the team to their very first World Cup qualification in 1990, reaching all the way to the quarter-finals. Jack, or 'Big Jack' as he was known to all, retired from the role in 1996 after serving a decade and entered retirement.

On his retirement, Charlton was granted honourary Irish citizenship, one of only a handful of people to have been granted the honour. He also received the Freedom of Dublin in 1994, and was given a honourary doctorate from the University of Limerick the same year. He is survived by his wife, Pat Kemp, his three children and several grandchildren, and is understood to have passed away in his sleep.

The FAI posted a tribute video on Twitter to Charlton's memory and career, which has already surpassed one thousand retweets in less than 15 minutes.

Take a look.