Charles Spencer, the brother of Princess Diana , remembered his late sister on what would have been her 60th birthday.

Spencer, formally known as the 9th Earl Spencer, attended the unveiling of a statue dedicated to Diana on Thursday at the Sunken Garden at Kensington Palace.

Prince Harry and Prince William reunited for the intimate event, which also included Dianas two sisters Lady Sarah McCorquodale and Lady Jane Fellowes the sculptor of the statue, Ian Rank-Broadley, members of the statue committee and those involved in the redesign of the garden.

After the emotional ceremony, Spencer posted two photos from the event. One included his sister Lady Jane Fellowes standing beside him as the two posed for a photo with the statue of Diana.

Today, in Kensington, he wrote. A good day.

Spencer also posted another photo from the unveiling, which showed Graham Dillamore, the deputy head of gardens and estates at historic royal palaces, posing by the bronze statue of the princess.

Dillamore, who knew Diana and regularly spoke with her when she would stop by the gardens, helped work on the newly redesigned layout of the Sunken Garden, which will be the permanent home of the statue.

The Kensington Sunken Gardens gardeners - heroes that I met today, Spencer wrote. Graham (left) was gardener here in the 1980s. He said to me this afternoon: I loved your sister. And I promise to look after this garden to the best of my ability, till the day I have to move on. And I believe him.

The garden, which was one of the late princesss favorite places, now includes a calmer and more reflective setting for the statue, according to a Kensington Palace release, as well as more of Dianas favorite flowers, including forget-me-nots.