Kylian Mbappé - Paris Saint-Germain F.C. Signables Collectible. Is there a more exciting youngster in the world to watch play soccer than Kylian Mbappe? The answer to that question would be a hard no. At just 21 years old, Mbappe has already won a World Cup with France and has taken Europe by storm because of his brilliant pace flying down the field. The forward has dreams of winning the Champions League with PSG.