The 19-year-old PSG player has been vital during France's tournament, establishing himself as a future international star.
If Mbappe plays on Sunday, he would add to the short list of other players who played in a World Cup final as teenagers.
Brazil's Pele and Italy's Bergomi are the only two players that have done so before.
Mbappe is also a lead contender in the fight to claim the Golden Ball prize.
The young star went to Russia full of confidence, after helping PSG win the domestic treble.
He netted the winner in the group stage match against Peru, before running riot against Argentina.
He has become France's youngest goalscorer in 54 years, and becoming the first teenager to score twice in a World Cup since Pele in 1958.
Mbappe has been touted as one of the possible contenders for the Ballon d'Or, but may miss out on the World Cup Golden Boot.
Mbappe trails Harry Kane by three goals before the final and third-place play-off.