Footage of 18-year-old West Ham player Declan Rice giving a pair of signed boots to a young fan.
The footage, captured on September 31 at London Stadium, shows Jack's mother receiving the boots after West Ham played Swansea.
''It was my son's 11th birthday so we took him to watch the West Ham match,'' the mother later wrote online.
''Jack off his own back decided to support the football team West Ham when he turned 5. No one he knew, not even family supported this team.''
''Jack has always believed he will play for West Ham one day and is extremely good at football and one of the top scorers.''
''Witnessing such kindness from Declan Rice was absolutely astounding and I know my son will treasure that moment his whole life,'' she continued.