Heterochromia of the eye may come in two varieties. With complete heterochromia, one iris is a different color than the other.
In partial or sectoral heterochromia, only a part of one iris is different.
Mila Kunis--one green and one brown.
Wentworth Miller--one blue and one green.
Virginia Madsen--one green and one brown.
Jane Seymour--one green and one brown.
Elizabeth Berkley--one bluish green and one brown.
Dan Akroyd--one green and one brown.
Kate Bosworth--one blue and one brown.
Christopher Walken--one blue and one hazel.
Kiefer Sutherland--one blue and one green.
Cats--Breeds such as Turkish Van, Turkish Angora, Khao Manee and Japanese Bobtail. These odd-eyed cats are white, or mostly white and have one blue eye.
Dogs--Siberian Husky, Australian Shepherd, and Catahoula Leopard.
Horses--More common in horses with pinto coloring, they have one brown and one white, gray, or blue eye.
Complete heterochromia may also be seen in cattle, water buffalo and ferrets.
Sectoral heterochromia is often seen in dogs, specifically in breeds with merle coats, such as the Border Collie, Collie, Shetland Sheepdog, Welsh Corgi, Pyrenean Shephard, Mudi, Beauceron, Catahoula Cur, Dunker, Great Dane, Dachsund and Chihuahua.
Tyrion Lannister from A Game of Thrones has one green eye and one black one.
The assassin Jonathan Teatime from Terry Pratchett's Hogfather has one grey magical glass eye and the other is yellow-white.
Wormtongue, in The Lord of the Rings, should have worn two pale blue contacts for the film, but the costumers discovered he looked creepier wearing only one.
Sally Owens, in Practical Magic, casts a spell for a man she thinks can't exist with one green eye, and one blue. Twenty years later, Detective Hallet is that man.
In the Anne of Green Gables sequel, Anne's House of Dreams, a pair of cousins have identical mismatched eyes.
In The Eternity Code, Artemis Fowl has one blue eye and one hazel because of an iris cam.
In Kristin Cashore's Graceling, all 'Gracelings' have this as a distinguishing characteristic.
The evil sorceress Xayide has one red eye and one green in The Neverending Story.
Leah from The Red Tent.
Alex in the Bill the Vampire series, has one brown eye and one green.
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Do you have, or know anyone with Heterochromia?