Everybody loves to see a youngster getting a chance at his club, especially when that particular kid has been tipped to reach the top since he was 14, 15 or 16 years old.
It doesn't always work out quite the way you'd expect it too; some players just don't manage to reach the heights they had hoped to—be that for reasons of injury, attitude or just being over-hyped.
On those occasions that they do, however, they become quickly some of the most talked about players in the game due to their great ability and even higher promise.
Here are 16 top youngsters looking certain to take the football world by storm over the coming years.
Note: "Unknown" is a bit of a misnomer these days given the extensive youth coverage available, so we'll be judging players, by and large, with three or less first team league appearances for their current club as being eligible for inclusion. Certain exemptions may apply.