Hojlund has made 95 appearances for the Reds since signing from Atalanta in August 2023, scoring 26 goals.
He lifted the Emirates FA Cup at the end of the 2023/24 season, after coming on as a substitute in the final against Manchester City.
Rasmus has agreed a move to the Serie A champions, under the management of Antonio Conte.
Napoli will be the fifth club Hojlund has represented during his career, following earlier spells with Copenhagen and Sturm Graz.
We'd like to wish Rasmus good luck for the campaign ahead.