1. Kylian Mbappe (Monaco -> Paris Saint-German)

At the age of just 19, Kylian Mbappe is tearing apart all the records. And even when it comes to the transfer records, it is no different.
After spending a year on loan at PSG, Mbappe made a move permanent with a €145 million move to the French club during the 2018 summer transfer window. With that, he became the second most expensive player of all time, only behind his PSG teammate, Neymar Jr.
Strength, speed, finishing. Mbappe has it all. The teenager was in explosive form in the FIFA World Cup 2018 in Russia and played a vital part for France to become the champions of the world.
He scored fours goals including a goal in the final and also won the young player of the tournament.