Princess Eugenie works at London art gallery Hauser & Wirth, which might be the reason she's allowed to have the account. The second post is a photo of her mother in honor of Mother's Day.
The princess debuted her Instagram page with a clip of her speech from WE Da.
She has uploaded images of her with her fiance Jack Brooksbank, showing the pair of them gazing at her engagement ring.
Her latest photo comes a day after she shared another sweet childhood snap to mark the U.K.'s Mother's Day, with her grinning alongside her sister, Princess Beatrice, while wearing a cute pink dress. "I hope to use this platform to share the causes, passions and people close to my heart", the 27-year-old wrote.
'I can think of no better way than today, global women's Day, to launch my personal Instagram, ' she captioned her first post.
The caption for her mother's photo read: "Happy Mother's Day to my legend of a mother".
Having an Instagram account may not seem like a big deal to the average person, but this is an unprecedented move by a British royal.
One of the most highly publicised (and modern) rules of being a member of the British royal family is keeping your distance on social media, with Prince Harry's fiancee Meghan Markle deleting her Instagram and Twitter accounts as well as her blog, The Tig, after the couple announced their engagement.
Official Palace accounts keep the people up to date with the activities of the Royals.