Prince George and Princess Charlotte's two-year-old cousin could be seen horsing around with rugby-playing dad Mike Tindall - with the little one being thrown upside down, up in the air and even poking her tongue out!
The little royal's day out was to support mum Zara Phillips as she competed in a horse jumping event in Gloucestershire, in preparation for her place in the Olympics this summer.
Mia's parents obviously think she's just as sweet as we do, as they dressed their little girl in a t-shirt that had 'I'm Super Cute' across the front. Grandmother Princess Anne was also at the event, and no doubt agreed with the slogan too.
It was a family day out with Mia's cousins Savannah and Isla Phillips also in attendance. It looks like Mia might be taking after her dad, as she playfully tackled big cousin Savannah, five, to the floor.
There can't have been any hard feelings though, as the youngsters toddled round the course affectionately holding each other's hands. Mum Zara has previously spoken about how much the little girl loves playing with all her cousins.
It appeared as though all that hard work having fun tired Mia out as she yawned and snuggled up to her dad later on, comforter in tow.
This isn't the first time Mia has held centre stage at a family event either. In the beautiful family pictures released by the palace to mark the Queen's 90th birthday Mia is up front and centre. The story about her picking up the Queen's handbag impromptu captured the nation's heart as the little girl can be seen proudly clutching at the handles.
Mia is 17th in line for the throne and great-granddaughter of the Queen.