The veteran stopper has joined the French champions on a one-year deal with the option of a second season at the Parc des Princes.
He would become the first signing under the new PSG manager, Thomas Tuchel, who replaced now-Arsenal boss Unai Emery.
Gianluigi Buffon won the World Cup with Italy in 2006 and the UEFA Cup with Parma in 1999, but has never lifted the Champions League, losing three finals with Juventus.
Buffon confirmed he sought counsel from former Juventus team-mate Blaise Matuidi before opting to join the France worldwide at PSG, where he will play under new coach Thomas Tuchel.
Buffon's move to PSG could see Alphonse Areola, first choice keeper last season, or Germany global Kevin Trapp leave the club.
And in signing for PSG, Buffon still has one last chance to finally lift the Champions League trophy that slipped through his grasp on so many occasions during his wonderful stay in Turin.
"PSG intrigued me a lot because of the talent in the team, but they were not enough to make the leap". "I have followed the club's incredible progression in recent years, and I know what dreams PSG and its fans hold in their hearts". I also think that I can help the team to improve. "I think that the team has the character of the coach".
Yet one mindblowing aspect of the new chapter in Buffon's storied career is he is training alongside Weah's son, Timothy.
Buffon, former captain of Juve and Italy, retired from the worldwide stage in November after the Azzurri lost a World Cup playoff to Sweden, although he returned for a couple of friendlies. Over two decades later and the 12-time Serie A goalkeeper of the year is now a PSG player.