This image was taken by photographer Terence Donovan in 1986 and depicts her as a 25-year-old wearing a purple crushed-velvet ball gown.

This image was taken by photographer Terence Donovan in 1986 and depicts her as a 25-year-old wearing a purple crushed-velvet ball gown.

When Diana saw the picture, she reportedly pulled a face and expressed her distaste.

It is said that she wanted to portray herself as more approachable and thought the photo was too formal for her. Nonetheless, it is a very striking image.

Despite her known dislike of the photo the Royal Mail later selected it as part of a stamp collection to commemorate her after her death in 1997.