The 20-year-old was named on the bench during the club’s Champions League clash against their Belgian opponents.
However, Mbappe came off the bench seven minutes into the second-half replacing Maxim Choupo-Moting.
And it’s fair to say the Frenchman had quite an impact.
It took him nine minutes to make it 2-0 to PSG.
It took him a further two minutes to set up Mauro Icardi to make it 3-0.
He then scored two more goals to complete his hat-trick to see his side win 5-0.