British author Hilary Mantel criticized for comparing Kate Middleton to a machine made doll calling her "plastic."

Mantel faced the wrath of many when she called the Duchess of Cambridge, Kate Middleton, a "shop-window mannequin." Prime Minister David Cameron said the author was misguided when she called the pregnant duchess a "machine made" doll without any personality of her own.

"I saw Kate becoming a jointed doll on which certain rags are hung," Mantel said in a lecture at the British Museum in London earlier this month in which she spoke about her changing view of the princess. "She was a shop-window mannequin, with no personality of her own, entirely defined by what she wore. These days she is a mother-to-be, and draped in another set of threadbare attributions."

Cameron said what Mantel stated was wrong and that people should be more supportive of Middleton as she's a "great ambassador of Britain."

"She writes great books, but I think what she's said about Kate Middleton is completely misguided and completely wrong," Cameron told Sky News.

Mantel also said that Middleton's role in the Royal family was merely to provide an heir.

"Once she gets over being sick, the press will find that she is radiant," Mantel said in the lecture organized by the London Review of Books on Feb. 4.  "They will find that this young woman's life until now was nothing, her only point and purpose being to give birth."

The literary magazine reprinted the lecture on its website this week.

However, Middleton has remained unaffected by the remarks while well-wishers say that Mantel's comments were totally uncalled for.