Kalimuendo has signed a five-year deal after Forest concluded a deal with Rennes to sign the 23-year-old striker, who scored 18 goals for the Ligue 1 side last season, in a deal worth €29m.
The deal comes after a weekend that had already seen Forest spend a club record €43.5m to sign Hutchinson from Ipswich and €35m to get midfielder McAtee from Manchester City.