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13-year old Magnus Carlsen vs. Garry Kasparov, 2004
Below you can see a rating progress chart for the top-10 youngest GMs in the history of chess, from Sergey Karjakin (earned the title at 12 years 7 months) to Etienne Bacrot (14 years 2 months). Obviously, Magnus Carlsen is dominating just about any age category. Please note that the promising players who haven't made it to the top-10 youngest GMs are not featured, while some of them have very impressive results. A notable example is Anish Giri, who was rated over 2700 at 18 years old.