“On this day two years ago…Jack and I announced we were engaged,” she captioned the image, which showed the couple smiling in the Picture Gallery at Buckingham Palace.
The princess is pictured wearing a floral mini dress designed by Erdem, which she first showcased in 2016 for a photo shoot with Harper’s Bazaar.
The image quickly garnered more than 130,000 likes on Instagram with fans taking to the comments section to welcome Eugenie back to social media.
“Welcome back to Instagram. I hope you and Jack are doing well. You are an amazing person, philanthropist and princess,” one person wrote.
Another commented: “So sweet. Good to see you on here again. You’ve been missed!”
A third person added: “Lovely couple, lovely day. Wishing you two all the happiness in the world.”
Princess Eugenie wore an ivory wedding gown, which was designed by Peter Pilotto and Christopher De Vos and featured a low back to reveal the scars she acquired after having an operation at 12 years old to correct her scoliosis.
At the time, Prince Andrew issued a statement saying: “It has become clear to me over the last few days that the circumstances relating to my former association with Jeffrey Epstein has become a major disruption to my family’s work and the valuable work going on in the many organisations and charities that I am proud to support.
“Therefore, I have asked Her Majesty if I may step back from public duties for the foreseeable future, and she has given her permission.”