Prince Edward, Duke of Kent has been admitted to hospital, a Buckingham Palace spokesman has confirmed.
He is said to have injured himself on 4 April while spending the Easter weekend at the Balmoral Estate in Scotland, but was not officially taken to hospital until 5 April.
The 79-year-old is being treated at Aberdeen Royal Infirmary with a suspected dislocated hip.
The last time the Royal Family member officially spent time in hospital was in March 2013, when he was admitted after suffering a "mini stroke", also known as a transient ischaemic attack.
The Duke takes part in a large number of royal events including presenting trophies at Wimbledon, where he is president of the All England Lawn Tennis Club.
The Queen's cousin is the son of the late Prince George, the younger brother of King George VI and King Edward VIII. He became Duke of Kent when he was just six years old after his father died in a military air crash, the first death of a member of the Royal Family during active service in 400 years.
The Queen has been regularly visiting family members in hospital of late. In June 2013, Prince Philip, her husband, was admitted for exploratory abdominal surgery, following a previous treatment for a bladder infection.