Kate Middleton is preparing Prince George's younger sister Princess Charlotte for her future roles.
The Mirror reports Kate Middleton wanted Prince George to take on a responsible role when Charlotte started school at Thomas's Battersea in 2019.
While the Duke and Duchess of Cambridge prepare to send their only daughter to a lower school, Charlotte slightly follows her mother to the main entrance, after which Kate asks George to lead her sister.
He said: "George must lead."
Royal biographer Penny Junor further told Hello: "Prince George is a very protective and loving big brother.
"I'm sure he'll take care of his little sister and take great pride in showing her the ropes.
Charlotte's first day of school was very important for Kate and William, especially after the Duchess recalled George's first day when she was suffering from hyperemesis gravidarum.