Kate Middleton stuns in Michael Kors dress for Princess Charlotte's first day of school

And it's back to school for the Cambridge children!

Princess Charlotte and Prince George arrived at Thomas's Battersea in South London on Thursday for the start of another semester. George is beginning yet another year at the $23,000-a-year prep school, while Charlotte is starting her first!

Although the Duchess of Cambridge had to miss Prince George's first day of school in 2017 because she was suffering severe morning sickness with Prince Louis, she was on-hand alongside Prince William to drop off the couple's two eldest children.

For the occasion, the Duchess of Cambridge glowed in a £215 MICHAEL Michael Kors midi dress, a glossy blowout and navy stilettos heels. The mom-of-three had worn the floral chiffon shirtdress from the designer's Spring 2019 collection to the Duke and Duchess of Sussex's rehearsal dinner back in 2018.

The palace announced back in May that the four-year-old princess would be joining her big brother at the South London school.

"We are delighted that The Duke and Duchess of Cambridge have decided that Princess Charlotte will join her elder brother, Prince George, at Thomas’s Battersea," said headmaster Simon O'Malley at the time. "We greatly look forward to welcoming her and all of our new pupils to the school in September."

The royal tot's first year at the school will include classes such as computing, French, art, drama and ballet, in addition to her core studies such as math and reading.

Charlotte, who will go by Charlotte Cambridge to her peers and teachers, "can’t wait to be with George at big school!” said a source to People.

For more on the royal's big day, watch the video above!