What number will Kylian Mbappe wear at Real Madrid?

Real Madrid confirmed the signing of Kylian Mbappe on a free transfer, concluding a years-long wait for him to join. But now the question arises what number will Mbappe winner wear at Madrid? After wearing 7 in PSG, Mbappe will wear number 9, as per Fabrizio Romano who also revealed the Frenchman is ready to wait for the number 10.