Paris Saint-Germain underlined their intention to dominate the domestic and European stages with the 63-million-euro signing of Argentina international Angel Di Maria.
The 27-year-old joined from Manchester United on a four-year deal.
Di Maria went to England from Real Madrid at the start of last season for a fee of 83 million euros.
"Paris Saint-Germain is delighted to announce the signing of Angel di Maria until June 30, 2019," said a club statement on Thursday.
Di Maria underwent a medical in Doha before flying to Paris on Wednesday.
He becomes the second most expensive player in the history of French football behind the Uruguayan striker Edinson Cavani, who joined Paris from Napoli for 64 million euros in the summer of 2013.
"I am very proud and can't wait to wear the colours of Paris Saint-Germain," said Di Maria. "I want to win every competition we enter, both in France and Europe," he added.
Di Maria won the Uefa Champions League with Real Madrid in 2014 before moving to Manchester United.
The former Benfica winger made a strong start to his Old Trafford career, with a goal and an assist in three of his first four games.
But after being played in six different positions, including central midfield and striker, an injury prevented him from playing for the whole of December 2014.
Reports that he was unsettled in Manchester followed an attempted break-in at his home in January.
He was sent off in the FA Cup quarter-final defeat against Arsenal on 9 March and did not start another game until the final match of the campaign at Hull. He limped off with a hamstring injury after 23 minutes.
"I want to win the Champions League, which is a dream for all footballers, for a second time. We will do everything we can to bring Europe's biggest trophy to France and the fans of Paris Saint-Germain," added Di Maria.
After helping Argentina reach the final of the Copa America in Chile last month, Di Maria is behind in his pre-season preparations and will not play any part in PSG's first game of the new season at Lille on Friday.
Di Maria is the third signing for Laurent Blanc's side who completed a domestic treble last season of Ligue 1 title, Coupe de France and Coupe de la Ligue.
German goalkeeper Kevin Trapp joined from Eintracht Frankfurt for 9.5 million euros and midfielder Benjamin Stambouli moved from Tottenham Hotspur for nine million euros.
The arrival of Di Maria could spell the end for his compatriots Javier Pastore and Ezequiel Lavezzi and Brazilian winger Lucas, who all now risk being pushed down the pecking order at the Parc des Princes.