born in greenwich, london, weston attended erith secondary school, and was spotted by a millwall scout when playing for the school team and subsequently joined millwall's youth academy. in only his second appearance for millwall's first team, he replaced player-manager dennis wise in the 89th minute of the 2004 fa cup final against manchester united to become the youngest fa cup finalist at the age of 17 years 119 days, beating the 125-year-old record of james f. m. prinsep. he said "it's obviously the highlight of my career so far. i supported manchester united as a kid so that made it even more special. i didn't get long on the pitch, but i got a few touches. i remember a sliding tackle on ruud van nistelrooy, and a 50–50 with nicky butt. i kept my shirt, and i also got mikaël silvestre's".