Princess Diana’s sister was involved in a horse accident, it has emerged.

Prince William and Prince Harry’s aunt has been to hospital (Image: AP)

Prince William and Prince Harry’s aunt, Lady Sarah McCorquodale, has been “seriously injured” following a fall during horse-riding, it has been claimed. One of the late Princess Diana’s older sisters, 70, had to go to hospital after a “bad fall,” according to her brother, Earl Spencer.

The Earl, 61, said that his sister has not been enjoying her time confined to a bed and has been “quite a handful” as a patient. Lady Sarah went out with King Charles before introducing him to the late Princess of Wales.

He told the Rosebud podcast: “Sarah, who is nearly a decade older than me, who was always in trouble, she’s quite punchy.

Charles Spencer gave an update on one of his sisters (Image: Getty)

“She’s still riding, and she’s had a really bad fall in the last month and has been in hospital for a long time. And I think, [she] was quite a handful as a patient, because the lead doctor said to my brother-in-law, ‘She’s quite a character, isn’t she?’

He said that his other sister, Lady Jane Fellowes, 68, is the ‘complete opposite’ of Lady Sarah, and described her as “really sweet and really funny”.

According to the Mail, although his sister was said to be “seriously injured, Lord Spencer did not give any further details about her injuries.

The Earl regularly talks about all three of his sisters and their family home, Althorp House.

This summer, he marked his late sister’s death anniversary on August 31, by sharing a photograph on social media of some flowers he had picked to take to his sister’s resting place on the Althorp estate. Diana died in a car crash in Paris on 31 August, 1997.

Charles wrote: “Flowers we cut this morning from Althorp’s gardens for the Island. Always an impossible day.”