Lupinski, who is 16 years old, has signed a two-year professional contract with the club.
In a statement on the club's website, Lupinski expressed his excitement about joining Arsenal, saying he is "lost for words" and that it will be an "unbelievable" experience.
Ben Smith, the Academy Manager of MK Dons, praised Lupinski's achievements, highlighting his dedication, hard work, and skill.
Smith noted that Lupinski's development over the past few seasons has been outstanding, and that it is a testament to his commitment and practice.
He also expressed his team's excitement about Lupinski's future and their hope to see him continue to progress.
