Brazilian-born Italy midfielder Thiago Motta on Tuesday joined Paris St Germain from Inter Milan for a fee believed to be in the region of 10 million euros, Italian media reported.
The 29-year-old has signed a three-and-a-half year deal worth around two million euros a season.
PSG officials had travelled to Milan late on Monday to try to tie up the deal for a player who won the treble of league, cup and Champions League with the nerazzurri only 18 months ago.
Motta began his professional career with Barcelona, having moved to Spain while still a 17-year-old.
He went on to play for Atletico Madrid and Genoa before joining Inter in 2009.
Motta qualified to play for Italy through Italian grandparents and made his Italy debut in February 2011, despite having already represented Brazil at the 2003 CONCACAF Gold Cup competition.
Although that was an official competition, Brazil fielded an under-23 side and FIFA would later rule that Motta could therefore still represent another nation.