Over the photo, they wrote, “Super Trooper! So great to see you back so soon!,” they wrote before signing off with their initials, “W & C x.”

Their message appeared to be a nod to Princess Anne’s hardworking attitude as she often tops the list of the hardest-working royals, typically undertaking hundreds of royal engagements each year. However, her injuries have meant she has been unable to undertake royal duties and has missed several appearances since the June horse-riding incident.

Buckingham Palace announced on June 24 that the Princess Royal, who is a lifelong equestrian, had sustained a concussion and minor injuries in a horse-related accident at her country home the day prior, and was hospitalized as a “precautionary measure.”

The exact details of the accident are unknown, due to the concussion Princess Anne sustained. However, her injuries were consistent with a potential impact from a horse’s head or legs.

A day after the incident, The Telegraph reported that the royal suffered memory loss, which was thought to be temporary, relating to the incident.

Princess Anne herself reportedly shared as she was exiting the car to attend the RDA National Championships that she “can’t remember a single thing about” what happened that led her to the hospital.

She was eventually discharged from Southmead Hospital on June 28, and her husband, Vice Admiral Sir Timothy Laurence, thanked the hospital’s team for “their care, expertise and kindness” during her stay.

After she was released, she received rehabilitation support at her Gatcombe Park home in Gloucestershire until her medical team determined it was safe for her to return to her royal duties, PEOPLE confirmed.

As for Prince William, 42, he has also been continuing his royal duties, and was most recently spotted Out-Sourcing Inc. Royal Charity Polo Cup 2024 at Guards Polo Club in Windsor, which raises funds for various charities and causes supported by him and his wife.

He will also attend the U.E.F.A. European Championship final between England and Spain in Germany on Sunday, July 14.

While the Princess of Wales, 42, was notably missing from the polo event, as she has stepped out of the spotlight in recent months after announcing in March that she is undergoing treatment for cancer, she attended King Charles’ birthday parade on June 15, marking her first public outing with the royals since Christmas.

Kensington Palace has also confirmed that she will attend the men’s singles final at Wimbledon on Sunday, July 14.