Princess Eugenie and her husband Jack Brooksbank welcomed their first child, August Philip Hawke Brooksbank, in February 2021.
The now three-year-old is an adorable toddler.
Click through to see photos of the royal youngster.
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Proud mum Princess Eugenie has marked her son August's third birthday with a series of snaps.
"Happy 3rd Birthday to our dearest Augie. Forever a force of nature and forever giggling with you," she wrote alongside the photos.
August, affectionately known as Augie, turned 3 on February 9.
Eugenie shared three photos of her eldest child on social media including this sweet picture showing the pair sharing a kiss while wearing beanies.
In another photo Eugenie and Augie as dressed warmly and seated on the ground and leaning against a brick wall.
Mother and son are laughing as their photo is taken, most likely by dad Jack.
The third photo shows Eugenie smiling into the camera while holding both her boys, August and Ernest.
Augie's arm is around his baby brother who is now nine months old.
Princess Eugenie shared a recent visit to a local aquarium with her son August and his cousin Sienna for World Earth Day.
The toddlers seemed fascinated watching the penguins swim.
"It's World Earth Day and today is all about celebrating our planet and people doing amazing things that help protect it," the princess wrote alongside the photos.
Princess Eugenie and Jack Brooksbank have shared a photo of son August meeting his baby brother for the first time.
The royal couple welcomed their second child, son Ernest, on May 30, 2023.
In the photo August has gently placed his hand on Ernest's head.
Mother's Day 2023 appears to have been an icy affair for Princess Eugenie and son August.
Eugenie shared this snap for Mother's Day in the UK writing: "I love being your Mumma! Happy Mothers Day! Xx."
Princess Eugenie shared the news she was expecting a second child with a sweet photo showing son August kissing her belly.
She and Jack Brooksbank's second child Ernest was born on May 30, 2023.
Princess Eugenie shared a rare glimpse of life with her son August to celebrate his second birthday in 2023.
The royal took to Instagram to wish her son a happy birthday and posted some adorable pictures and videos of the toddler.
In one in the clips, Augie can be seen dancing and running around during a trip to the zoo.
For his 2nd birthday proud grandmother Sarah, the Duchess of York, wrote on social media: "Happy 2nd Birthday to our boy Augie.. you are our worlds greatest joy. Keep dancing and smiling my angel. X."
Here Augie is with his father, Jack Brooksbank, one Christmas.
In another adorable photo, Augie is stomping around in the mud alongside his mum.
Princess Eugenie marked Mother's Day 2022 with a photo showing her embracing her son August.
She paired the photo with one of her mother Sarah, the Duchess of York.
"Happy Mother's Day to every mother out there," the royal wrote.
In one of Eugenie's Instagram stories, Augie is seen saying goodbye to his "dadda" – Eugenie's husband Jack Brooksbank.
Eugenie marked Augie's second birthday in 2023 with a special photo album, which comes soon after she shared some exciting pregnancy news.
In January, Eugenie announced she is expecting her second child, with the couple sharing a sweet pregnant announcement on social media alongside a statement from Buckingham Palace.
"We're so excited to share that there will be a new addition to our family this summer," Princess Eugenie told followers.
Augie's grandmother, Sarah, the Duchess of York, also reacted to the news with a sweet photo of Augie, gushing about being in "granny heaven".
"You will be sharing puddles, Augie! Superb news, Granny heaven…. So deeply grateful," she wrote on Instagram.
In March 2022, Princess Eugenie celebrated her birthday in the park with husband Jack and Augie.
Princess Eugenie and Jack Brooksbank have marked son August's 1st birthday with a trip to the snow.
In a second photo marking August's birthday we see the baby boy at a play group with his name tag reading 'August.'
Princess Eugenie wrote alongside the photos: "Happy 1st Birthday to our little hero Augie. You are such a special soul that brightens every room with your smile and wave. You have made us so very proud. We love you!"
Lucky Augie sat front row at his late great-grandmother Queen Elizabeth II's Platinum Jubilee celebrations in 2022.
Here, the toddler is mesmerised listening to Ed Sheeran perform during the pageant
Jack Brooksbank held his son August during the Queen's Platinum Jubilee pageant in 2022.
Augie seems to be enjoying the show, clapping as he watches the spectacle.