Princess Beatrice has kept her 3-year-old daughter Sienna out of the spotlight, but when Buckingham Palace announced on October 1 that Princess Beatrice is expecting her second child, royal fans shared adorable new photos of the toddler. But the sweet snaps didn't stop there, as her sister Princess Eugenie and her mother Sarah Ferguson, Duchess of York, both shared congratulatory Instagram posts after the news broke.

Ferguson, 64, shared three unpublished photos of her family with fans on social media, writing, “So proud GiGi/Mom today. Such a wonderful blessing and a hug for my heart."

Ferguson also shared that she is ”so proud to be a part of this family.

She added, “Wolfie, August, Ernie, and Sienna will be overjoyed to have their fifth member aside!”

In the first photo, Princess Beatrice and Ferguson, both in gorgeous blue dresses and flower crowns, are wearing white with a green sash. They are kneeling in front of Sienna, who is wearing a flower girl dress. As “Hello! reported in June, the toddler was the star of Beatrice's friend Marissa Montgomery's wedding this summer and joined the bridal party with Rebel Wilson's 1-year-old daughter.

Ferguson also posted a graphic expressing her “joy and excitement” about “being a grandmother again,” adding, “Watching you grow up as a mother is one of the greatest privileges of my life.”

A second photo showed Sienna wearing a white floral sun hat over her platinum blonde hair as Princess Beatrice knelt on the lawn in front of her daughter, and the Duchess released a third photo of her two daughters with a big smile on her face as she hugged them.

As for Princess Eugenie, she congratulated her sister “Bear Bear” on Instagram on Tuesday, saying, “I am looking forward to more of this journey of being a mother together. And adding another little one to the gang.”

But she experienced a relatable mother moment in the process, saying, “I couldn't find a single group shot of us 🤦🏻‍♀️, so this one from Christmas 2022 has to do. xxxx.” She added.

This photo, which many families probably have on their camera rolls, shows Sienna (snowsuit covered in mud) facing the camera as Eugenie's husband, Jack Brooksbank, takes care of young August, she holds onto her hat, and Beatrice is on a sunny but stormy beach, laughing beside her.

According to a Buckingham Palace press release, Princess Beatrice's new mate is due in “early spring” and her uncle, Prince Charles, is “delighted with the news.”