As far as I know, it's Mohammad Aamer from the Pakistani side. He's a left arm pace bowler, and he's only 17! He played in this years Champions Trophy and earlier this year in the World Cup. :)
Sachin Tendulkar
Nitish Kumar of Canada at the age of 16.
Nitish Kumar (Canada) Born 21 May 1994
Before Nitish Kumar, the youngest player to represent his country in World Cup cricket was Hasan Raza of Pakistan. He made his World Cup debut at the age of 14 years and 227 days during the 1992 Cricket World Cup. Raza's record stood until Nitish Kumar represented Ireland in the 2023 Cricket World Cup at the age of 16 years and 122 days.
kapildev
The youngest member of the 2011 Pakistani Cricket World Cup squad is Ahmed Shehzad.
Bermuda
Talha Jubair (Bangladesh) is the youngest player to play world cup cricket match. He was 17 years and 70 days in 2003 Cricket World Cup to play for Bangladesh
It is sachin Tendulkar.
Hasan Raza From Pakistan
adam gilchrist
James Thompson circa 1345