She's been wearing the same nail polish since 1989 — and it's surprisingly cheap.

Apparently the queen is rather taken the Essie's classic pale pink polish Ballet Slipper, which retails for just $9.

Essie says that, in 1989, Queen Elizabeth's hairdresser wrote a letter to nail polish-mogul Essie Weingarten requesting a bottle of the classic shade. Her majesty refused to wear any other color.