Zara and Mike Tindall better grab their cameras – their eldest daughter, Mia Tindall, is marking a huge milestone this September! Just like five-year-old Prince George did last year, his cousin will be heading off to ‘big school’ for the first time ever. While it’s not known which school the four-year-old will attend, it will most likely be somewhere close to the family’s home on Princess Anne’s Gatcombe estate in Gloucestershire.

MORE: The most adorable photos of Mia Tindall

Now that the Queen’s great-granddaughter will be on a schedule, her vacations with her parents and newborn sister Lena are bound to change. Mike, 39, told HELLO! earlier this month that he’s preparing for little Mia’s first day of school, and also revealed what a typical holiday looks like for the Tindall family. “When I was still playing rugby and Zara was riding, it didn’t really look like much,” he said. “My season ran from July to June, and her season runs from March to October. Fortunately, she can plan her own so we managed to find a week in there.”

He continued: “Since I retired, it’s allowed us to do a little bit more but mainly around the Christmas time. We do some work for the Magic Millions down in Australia so we managed to spend six weeks down there as our holiday – the last year before Mia goes to school so we won’t be able to do it again, so that’s what holiday time looks like now. What it’s going to look like when Mia goes to school, it’s going to change probably again so we’re going to have to figure it out.”

MORE: Mike Tindall reveals what ‘brilliant’ daughter Lena is wearing in the heatwave

One good option for Mia’s schooling is less than 10 minutes from Gatcombe: mom Zara’s alma mater, Beaudesert Park School in Minchinhampton. Having just welcomed their second child on June 18, it would be nice for the Olympic medallist to have a short drive to drop-off. The prep school accept boys and girls aged three to 13, where they learn French and more through play. Wherever Mia ends up for school, she’s sure to make a mountain of friends given the bubbly personality and infectious energy she always has on display when out with her family!