Prince George will be quick to show his little sister the ropes with Princess Charlotte set to start big school next year.
It is expected that Prince William and Duchess Catherine's middle child will join George at Thomas's Battersea.
Young George will be in Year Two when his sister begins her next big adventure.
The darling princess is already a student at Willcocks Nursery School, which she started back in January this year.
Catherine shared with the world two darling snaps of her little one's big moment.
"The Duke and Duchess of Cambridge are very pleased to share two photographs of Princess Charlotte at Kensington Palace this morning.The images were taken by The Duchess shortly before Princess Charlotte left for her first day of nursery at the Willcocks Nursery School."
Charlotte, who turned three in May, will simply adore life at Thomas's Battersea.
The co-ed school upholds a set of core values - kindness, courtesy, confidence, humility and learning to be givers, not takers - the elite school holds an impressive record of senior school entrance and scholarship successes.
In fact, the Tatler Schools Guide says the "cream of the Battersea crop rises to the likes of Eton and Wycombe Abbey."
The school, which is just a stone's throw from their royal residence, currently has 544 day pupils, aged between four and 13.
She'll be taught a diverse range of theoretical and practical subjects ranging from ballet, drama, music, art and technology.
With language a key part of the curriculum, Charlotte will be learning French before she later moves onto Mandarin. In years 4 and 5, she'll also have the option to learn Spanish.
The prestigious school places large emphasis on the character they wish to build for their pupils. The number one rule is not "no hat, no play", but rather "be kind."
It is for this reason, that students are discouraged from having best friends, so as to not ostracise others.
"We expect pupils at Thomas's to be kind; to be good friends to those around them, always on the lookout for those in need of a word of encouragement or a listening ear. We expect our pupils not just to tolerate but to celebrate difference, including faith, beliefs and culture," reads the school's core values.