Mbappe will wear Paris Saint-Germain‘s No.7 shirt this year, following in the footsteps of his hero and ditching the N0.29 he wore at Monaco and during his first season in Paris.
The No.7 shirt was available following the January transfer of Lucas Moura to Tottenham.
“I thought for a long time that the number was not important, it was only on the pitch that it mattered but it is an indication of your ambitions, the player you want to be,” Mbappe told the club’s website.
“I will try to continue my progress on the field and I think for me it was the right time to change number, I think it’s a kind of affirmation.
“Number 7 is a legendary number, many great players who have worn it. I hope I could do credit in the field with this number.
“I will continue to work to continue my progress and see where it leads me but, with a number like this, we start well!
“I came to Paris Saint-Germain to leave my mark, there is a beautiful story to write and this is just the beginning.
“We are here again for good years and I hope that we will be able to do great things together.”
Buffon had spent 17 seasons with the Italian giants, cementing his status as one of the club’s all-time greats.
“It is with a great feeling of happiness that I join Paris Saint-Germain,” Buffon said on PSG’s website.
“For the first time in my career, I am leaving my country and only a project this ambitious could have encouraged me to make such a decision. I want to thank the club and the president for their confidence.
“To have followed the club’s incredible progression in recent years, I know what dreams Paris Saint-Germain and its fans have in their hearts.
“I am going to bring all my energy, all my experience and all of my thirst to win to help my new club achieve all the great objectives it has set out for the future.
“With my teammates and our supporters, we will share fantastic emotions at the Parc des Princes and in all of the stadiums in which we are going to represent Paris, a marvelous city that deserves to one day see its club at the top of international football.”
“We all feel an immense pride in welcoming Gianluigi Buffon into the great Paris Saint-Germain family, PSG president Nasser Al- Khelaïfi said.
“The immensity of his career, as well as his ambitious personality, unifying and elegant, make him one of the most admired and respected players in world football.
“At 40 years old, his passion for football is intact and Gianluigi has found the ideal environment in our project to set himself extremely high objectives transmitting his experience, not only to the other goalkeepers at the club, but to all of our players.
“Our supporters will know how to welcome Buffon with the enthusiasm and love that he deserves.
“His arrival reaffirms our will to always go higher, an ambition that we intend to pursue with a determination just as strong.”