Alessio Daniel Castro-Montes (born 17 May 1997) is a Belgian professional footballer who plays for Union SG.

under the coaching of his father, where also his three year older brother played.

He was soon noticed by a scout from Standard Liège and shortly after moved to the club where he played for seven years.

[4] On 1 September 2023, Castro-Montes signed a three-year contract with Union SG.

[5] Castro-Montes was born in Belgium to a Spanish father and a Belgian mother.