Kolo Muani spent the second half of last season on loan at Juventus, where he scored five goals in his first three Serie A games, and also featured for the Italian club at the Club World Cup, netting a double in their opening game of the tournament.
The player expressed his desire to remain at Juventus, but a deal could not be agreed and instead he has travelled to London.
"I know what the coach expects from me. I will fight hard for the shirt, the club and the fans. I will give everything for this team," Muani said.
PSG signed Kolo Muani from Eintracht Frankfurt in 2023 for a reported fee of 90 million euros, but the player struggled to make it into Luis Enrique's starting side. He has, however, remained a regular in Didier Deschamps' France squad.