A World Cup often sees previously unknown players light up the biggest stage, or young players burst onto the scene to make themselves household names among football fans around the world.
A 21-year-old Alexis Sanchez impressed for Chile at the 2010 World Cup in South Africa, while the performances of Germany's Mesut Ozil persuaded Real Madrid to snap up the 21-year-old. Similarly, Real also signed a 22-year-old Angel di Maria after his performances with Argentina.
The 2010 World Cup saw then-20-year-old Thomas Muller impress for Germany, while a 23-year-old Luis Suarez made himself a household name for both right and wrong reasons.
So who will be the youngsters who impress at this year's tournament? Perhaps earning themselves a big move, or simply confirming their name as one of the best youngsters around.
Here are 20 young players who could become stars of the 2014 World Cup.
Note: For "young" we've made 23 the maximum age to be included in the list.