Galtier, who left Nice last month after guiding them to fifth in Ligue 1 and a runner-up finish in the French Cup last season, has signed a two-year deal until the summer of 2024 with PSG.
The Champions Trophy is played between the league winners and the club competition winner in France.
It is worth highlighting that the 47-year-old was removed as the Spurs boss on 19 November after a sub-par start to the season.
With matches against top teams like Tottenham Hotspur and Manchester City coming up next, a loss against them could mean the end of the road for Ole Gunnar Solskjaer at Manchester United.
After Mourinho's appointment, Spurs registered three victories in as many matches. The team, which slumped to 14th spot in the Premier League table under Pochettino, have jumped to fifth spot.
Mauricio Pochettino had joined Tottenham Hotspur in 2014 and led north London the club to become a powerhouse in English football.
Jose Mourinho has been appointed as the new Tottenham boss and fans are still trying to make sense of what has just happened in a matter of a few hours.
It is worth highlighting that this will be Mourinho's first managerial assignment after he was removed as the Manchester United manager in December last year.
Mauricio Pochettino, who joined the Tottenham Hotspur in 2014, has led the club to become a powerhouse in English football.
Reports suggest that his former club Bayern Munich are interested in signing him as their manager for another stint.
