Both eyes are a different colour
Unlike sectoral heterochromia, where a part of the iris is a different colour from the main, heterochromia iridum involves one eye being a wholly different colour.
For Kate Bosworth, while her right eye is almost entirely hazel, her left is entirely blue.
It’s a beautiful thing
Bosworth isn’t the only celeb to have this condition. Simon Pegg and Dan Aykroyd both have it, too.