“He was coveted by a number of clubs across Europe and his arrival is a sign of his ambition which is matched by ours.
“Justin is an exciting and versatile attacking player who has an eye for goal. He is pacey, direct and boasts a high level of technical ability.”
Kluivert, the son of former Netherlands striker Patrick Kluivert, began his career at Ajax before moving to Serie A in 2018.
He scored nine goals in 68 appearances for Roma and spent last season on loan at Valencia following similar spells with RB Leipzig and Nice.