Kacper Kozlowski of Poland becomes the youngest player to ever play at a EURO!

Poland midfielder Kacper Kozlowski became the youngest player in the history of the European Championship after going on as a substitute.

The 17-year-old Kozlowski went on in the second half just before Lewandowski scored.

Kozlowski was born on October 16, 2003. England midfielder Jude Bellingham held the milestone for only six days. Bellingham was born on June 29, 2003. He was used as a substitute in the 1-0 win over Croatia on Sunday.