Kanye West's daughter peed on him during his Vogue cover shoot with Kim Kardashian, the magazine’s newest cover girl told Seth Meyers Tuesday.

The 33-year-old reality TV star — in her first interview since news broke of her cover on the fashion bible's April issue with West — said their big moment was left somewhat sullied by their 9-month-old daughter North West, after she urinated on her rapper dad while taking a family picture for the magazine.

Kardashian said the soggy surprise occurred while the photographer was taking a close-up shot of the family lying on a couch.

"North peed on Kanye in that shot,” she said. “He was trying to tell me. I had to get up and clean him off."

Kardashian, who had longed to appear on the cover of Vogue for many years, also explained how she kept the photo shoot a secret from all of her friends and family, including her sisters Kourtney, 34, and Khloe, 29. (Only her “Momager” Kris Jenner knew, she added.)

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"They were a little suspicious,” she said, adding that Jenner “knew because we used part of her house, but I told them it was something for Kanye. I don't keep the best secrets."

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