The Netherlands international has arrived on the back of a stellar season with Bologna and was attracting interest from a number of clubs.
However, the Reds wrapped up his signature as the first arrival of the summer, with the 23-year-old now due for a break following his Euro 2024 involvement, ahead of linking up with his new team-mates.
"I have a lot of trust and a good feeling about this step," he told club media's Steve Bartram in an exclusive interview. "It wasn't a difficult decision. I mean, I love Bologna a lot, but Manchester United just gave me a very, very good feeling.