The Tindall and Phillips cousins enjoy a fun day out with their grandmother Princess Anne

We can’t believe how fast the four girls have grown up!

It seems like only yesterday that Zara and Mike announced the birth of their second child Lena Elizabeth Tindall, and with her public appearances being incredibly rare over the past year, it's no wonder we couldn't believe how much she's grown when she was spotted out with her family at the weekend.
Zara and Mike Tindall took Lena, one, and their eldest daughter Mia, five, to the two-day Festival of British Eventing at Gatcombe Park, where they were also joined Zara's mother Princess Anne and her other set of grandchildren, Savannah, eight, and Isla Phillips, seven - Peter and Autumn Phillips' daughters.
Princess Anne spend some quality time with her four grandchildren, pictured here with Isla, Mia and Savannah. (Image: Getty)
Looking incredibly grown up Savannah, Isla and Mia were seen accompanying their grandmother around on day one of the festival, seen in cute candid photographs.
Princess Anne chose not to give her children, Zara and Peter, royal titles, something Zara has said she's incredibly grateful for. (Image: Getty)
Meanwhile little Lena kept close to her mum, wearing adorable pink dungarees and was spotted walking in public for the first time and she held tightly to a fluffy pony plush toy and later hitched a ride on her dad Mike Tindall's shoulders for a better view.
The family's appearance marked one of the first proper looks we've seen of Lena. (Image: Getty)
Showing the love for horses definitely runs in the family, Lena is seen carrying around a plush toy pony. (Image: Getty)
While on the first day Mia was seen having a ball on the bouncy castles, the second day she opted for some bright and glittery face paint, choosing a rainbow-coloured unicorn look – and we're sure her cousin Princess Charlotte would wholeheartedly approve, after being spotted with an adorable unicorn purse last month.
Princess Charlotte would've no doubt approved of her cousin's choice of face paint. (Image: Getty)
While we recently saw Savannah and Isla at Trooping the Colour in June, this family outing marks quite a while since we've seen the royal cousins out in public together.
Most notably the three eldest girls acted as flower girls for Princess Eugenie and Jack Brooksbank's wedding last year in October, where they were also accompanied by their Cambridge cousins Prince George, six, and Princess Charlotte, four.
The cousins are known to get along incredibly well, with Savannah Phillips and Prince George stealing the show at last year's Trooping the Colour for their hilarious interactions.
WATCH: The best moment from Trooping the Colour: Savannah Phillips teases Prince George. Story continues below...
And with little Prince Louis stealing the show at the same celebration this year, we're anticipating more cheeky antics from the youngest royals, Prince Louis, Lena and baby Archie very soon!