Brazil legend Pele congratulated Messi and Argentina on their World Cup victory and said the late Diego Maradona "is smiling now".
Maradona, who led Argentina to their last World Cup success in 1986, died in November 2020 at the age of 60 due to a cardiac arrest.
Pele also offered his sympathy to Mbappe after falling short in the final despite scoring a hat-trick on Sunday and praised Morocco for becoming the first African nation to reach the World Cup semi-final.
"Today, football continues to tell its story, as always, in an enthralling way, Messi winning his first World Cup, as his trajectory deserved," he posted on Instagram.
"My dear friend, Mbappe, scoring four goals in a final. What a gift it was to watch this spectacle to the future of our sport.
"And I couldn't fail to congratulate Morocco for the incredible campaign. It's great to see Africa shine.
"Congratulations Argentina! Certainly Diego (Maradona) is smiling now."