PIC: See Kourtney Kardashian, Scott Disick and Mason at Kim’s Wedding

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Did Kourtney Kardashian pull a Pippa Middleton?

The 32-year-old co-maid of honor (she shared the role with Khloe) stunned in a long, ivory gown for her sister Kim's nuptials to Kris Humphries on Saturday. Kourtney's 20-month-old son Mason, who served as ring bearer, also wore white, while Scott Disick (Kourtney's beau and Mason's dad) looked dapper in black.

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Last week Kourtney tweeted about the girls' green bridesmaids dresses, but Kim admitted to Ryan Seacrest on Friday that her sister fibbed about the dress color. Kourtney, Khloe, bridesmaids Kendall and Kylie Jenner, plus Kris Humphries' sister Kaela all donned white — not green — dresses for Kim's big day.

Kourtney told Us Weekly on Wednesday night she was worried about her tot performing his duties on Kim and Humphries' big day. "We'll see what happens," she said. "We'll see if he behaves!"

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But little Mason did go through with his gig on Aunt Kim's big day. "He made everyone laugh," a source told Us. "He kept going back up the aisle. Finally on the third try he had the rings!"

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So will Kim, 30, and Humphries, 26, want their own little Mason anytime soon? If Kris Jenner has anything to do with it, absolutely! "I would love more grandchildren!" the Kardashian matriarch told Us. "Mason is the love of our lives, and he is so much fun, but there's only one Mason to go around. It would be nice if we had some more!"

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