The holders advanced to the semi-finals of European club soccer's biggest competition by dumping out six-time winners Liverpool.
A 2-0 win at Anfield sealed a 4-0 aggregate victory and moved PSG a step closer to becoming only the second club to retain the trophy in the modern era after all-time kings of Europe Real Madrid.
"It's difficult to defend the Champions League, we know that," said coach Luis Enrique.
"We are here again and we need to make the most of these opportunities."
Ballon d'Or winner Ousmane Debele scored two second-half goals to kill off Liverpool's fight and book a clash against either Bayern Munich or Real Madrid.
Also on Tuesday (Wednesday AEST), Atletico Madrid advanced to the semis after a 3-2 aggregate win over Spanish rivals Barcelona.
It takes something special to hold onto the Champions League. Madrid won a hat-trick of titles between 2016-18, but no other team have managed back-to-back triumphs since the European Cup was rebranded in 1992.
PSG are out to make history after ending their long wait to conquer Europe for the first time last year. It is the second time in as many seasons that the French giants have knocked out Liverpool, who were in search of another famous Champions League comeback and dominated PSG for periods.
"It is a real pleasure for me to know that my team is at that level and can play at that level no matter who they are playing against," added Enrique, a two-time Champions League-winning coach, having triumphed with Barcelona as well.
Dembele's first goal ended Liverpool's hopes — a left-footed shot from the edge of the area in the 72nd minute. His second came at the end of a sweeping move in added time.
Liverpool had been dominated in Paris last week, but the Merseyside club had their chances despite losing Hugo Ekitike to an early injury. Virgil van Dijk was denied a first-half tap-in when Marquinhos pulled off a last-ditch block.
And a comeback looked on when referee Maurizio Mariani pointed to the spot for a foul by Willian Pacho on Alexis Mac Allister shortly after the hour.
With the score at 0-0, this was the chance to test PSG's resolve. But celebrations soon turned to disappointment when the penalty was overturned after review.
"We are very disappointed because I think there were parts in the second half where you could just feel that if we can score now this is going to become a special night," said Liverpool coach Arne Slot.
"Unfortunately, it's one of the many examples of this season where we weren't able to score from the many chances we had.
"But the future looks very bright for this team, for this club, because we've shown that we can compete with the champions of Europe in our stadium."
With PA.
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