Atwood is just the latest high-profile female writer to apparently attack the duchess' image and public persona.
Double Booker Prize-winner and Wolf Hall author Hilary Mantel has described Kate as a "shop window mannequin" and a "machine-made" princess who has been "designed by committee".
Meanwhile Sandi Toksvig has said the duchess doesn't have a "single opinion" of her own, and Joan Smith caused outrage by labelling Kate "unambitious and bland".
Speaking at a talk at the Victoria and Albert Museum in London, Atwood, who has also won the Booker for The Blind Assassin, admitted she judges women on the clothing they wear.
The novelist, who has been described as a feminist writer, said: "Let's pretend you're meeting a person for the first time, as you do when you meet a character in a book.
"What do I see? Your dress, I see your face of course, I focus on that. I see your earrings, I see your necklace, and those are all part of you. They are all part of the total image of who I've just met."