Despite Kensington Palace announcing last week that the Prince would be accompanied by both his mother and father for his first day, the Duchess of Cambridge was forced to pull out of attending last minute due to chronic morning sickness.
The milestone for the prince comes after the duke and duchess on Tuesday announced that they are expecting their third child.
Father and son, arriving hand in hand, and were greeted by the director of the nursery school, Helen Haslem, and George, obviously intimidated but courageous, did not fail to shake the hand held out by the latter before being escorted to the classroom.
Sporting his brand new uniform and holding onto his dad's hand, Prince George grinned a toothy smile as he happily showed off his dapper outfit.
Good luck, George! You got this.
While royal enthusiasts many wonder why Prince George is nearly always outfitted in shorts, style gurus say it's simply tradition.
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A THAAD battery normally consists of six launchers, but only two have been operational so far at the site in rural Seongju. The THAAD equipment was carried by about 10 USA military vehicles from Osan Air Base, some 70 kilometers south of Seoul.
However, he wasn't the only royal entering reception with Maud Windsor joining her distant cousin at Thomas's School in Battersea.
He said: "The whole aim of these precious early years of education is to give children that confidence in who they are".
"Here at Thomas's we have three principles, enjoyment, learning and achievement".
It's a Christian school, though it is open to children of all faiths. "But the emphasis is on making sure they feel safe, they feel secure and they feel happy".
"Then they will be here eventually for full days and then we will start to introduce them to the breadth of the curriculum". During the announcement, Prince William said: "We need Catherine to get over this first bit and then we can start celebrating".
A small crowd gathered close to the gates to watch George arrive.
This is indeed a very exciting time for their growing family!