The 18-year-old phenom left Monaco after firing them to the French title to join Paris Saint-Germain, in a deal that will eventually cost PSG £166million.
Mbappe has already made a considerable impression at the Parc des Princes, impressing with nine goals so far.
And his latest, scored in Tuesday night’s 3-1 Champions League defeat to Bayern Munich, was another record-breaking strike for the young French ace.
Mbappe’s header at the Allianz Arena was his 10th in the Champions League, making him the youngest player – at 18 years, 11 months, 15 days – to reach that milestone.
Mbappe’s fourth goal in six group games this term and his 10th in 15 Champions League games ensured he reached the landmark almost two years before the previous quickest, Karim Benzema (20 years, 10 months, 2 days).
In comparison, Lionel Messi and Raul were both 21 when they fired their 10th goal in Europe’s premier club competition, while Wayne Rooney was 22.
PSG’s loss in Germany meant little however, with Les Parisiens still finishing top of their group ahead of Jupp Heynckes’ side.