Kacper Szymon Kozłowski (born 16 October 2003) is a Polish professional footballer who plays as a midfielder for Turkish Süper Lig club Gaziantep.

In January 2022, he transferred to Premier League side Brighton & Hove Albion for a reported fee of £8,000,000, where he was immediately loaned to Brighton's sister club Union SG of Belgian First Division A for the rest of the season.

[6] On 19 July 2024, Kozłowski left Brighton permanently to join Turkish club Gaziantep for an undisclosed fee.

[7] In June 2021, Kozłowski featured for Poland at UEFA Euro 2020 in a 1–1 draw with Spain, to become the youngest player of any nationality to play at a European Championship, aged 17 years and 246 days, breaking the previous record of Jude Bellingham, who himself had broken the same record only six days prior.

Suffering the most severe injuries of the three, Kozłowski had broken his pelvis and broke three vertebrae in his lower back.