The youngest player to win the World Cup championship was Pelé (Brasil). He won the title in 1958, when he was 17.
The oldest player to win the World Cup championship was Dino Zoff (Italy). He did it in 1982 at the age of 40.
The youngest player to play in the World Cup was Norman Whiteside (Northern Ireland). During the match against Yugoslavia in 1982 he was 17 years and 42 days old.
The oldest player to play in the World Cup was Roger Milla of Cameroon. During the game against Russia in 1994 he was 42 years and 39 days old. He hit a goal in that match too.
The youngest player to score in the World Cup was Pelé (Brasil). He did it during a meet with Wales in 1958. He was 17 years and 239 days old.
My mistake he Milla was 42 he was also the oldest scorer in the history of the world cup.