After PSG and the player's representatives pushed through the deal late on Thursday, the Brazil forward arrived at the Parc des Princes on Friday lunchtime to give his first press conference as a PSG player.
Neymar's transfer fee is more than double the previous world record set by Manchester United's capture of Paul Pogba from Juventus last year for €105 million, leaving many commentators aghast at the rampant inflation in football transfer fees.
Neymar's stunning world-record move from Barcelona to Paris Saint-Germain has shocked the football world, but it is in keeping with the French club's rich history of attracting Brazilian stars to the capital.
Speaking after the move was confirmed, the Brazil international said it was PSG's ambition that drew him to the the Parc des Princes.
Al-Khelaifi stated that Neymar's arrival will bring PSG "even closer, with the support of our faithful fans, to realising our greatest dreams".
He will then be presented to fans inside the stadium at 15:45 local time (14:45BST) on Saturday before they begin their Ligue 1 campaign with a home match against Amiens.
"Barcelona and Catalonia will always be in my heart but I need new challenges", he added. You have to leave Messi, he is the idol at Barcelona'. I think my son has been a man, shown respect [to Messi] and now he has to go his own way'.
La Liga had earlier refused to accept the payment of the buyout clause from PSG, saying that the French club, which is owned by Oryx Qatar Sports Investments, infringes transfer rules and laws. I asked him not to put it up [on social media] because I wasn't sure what I was going to do, I still hadn't decided. Can PSG guarantee him the Ballon d'Or?
Unmissable on the field thanks to his Sideshow Bob haircut, David Luiz was a regular alongside Thiago Silva and kept another compatriot in the shape of Marquinhos out of the team during his two years at PSG from 2014 to 2016, before re-joining Chelsea and winning the Premier League last season.