Kourtney Kardashian at Kim's wedding

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.

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!"

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!"

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!"

Forbidden words detected! It appears you have commented recently. Please wait at least 2 minutes before posting another comment. August 21, 2011 - 7:30pm Kara Jones Trice Says:

I like the white bridesmaid dress. It's their wedding, it's up to them what colors are used. I love it. Congrats to them! I hope they ignore all of the haters! August 21, 2011 - 6:58pm Leah Jamilah Says:

i think the bride is the only one that should wear white. bad color choice kim. sorry August 21, 2011 - 1:46pm Christine Johnson Harker Says:

I am so ready for the mermaid dress style to go waaaay out of style. Is it complimentary to anyone? If it makes Kourtney look like she has massive hips, imagine what it does for average size people. August 21, 2011 - 1:44pm Carmen Vargas Says:

Comparing Kim & Duchess Catherine Is Like Comparing Apples & Oranges Kim Is Famous for Having a Sex Tape & No Talent & Famewhoring & Kate Is Famous for Marrying a Prince and She's Classy :D August 21, 2011 - 12:45pm Elizabeth Tarazona Says:

Nobody upstaged Kate or Kim the media just tries to make it seem that way. No matter what it's the bride's day regardless of how good or bad her attendants look. August 21, 2011 - 12:24pm ImaTest Page Says:

Co-maid of honor along with Khloe? Poor, stupid Kim. Seeing as Khloe is MARRIED, she should've been matron of honor, Kourtney maid of honor and Kendall & Kylie junior bridesmaids. Too bad Kim is too stupid to realize the mistake. August 21, 2011 - 11:50am Elizabeth Webber Says:

I think white for the bridesmaids is a cool choice... Kim had an off white dress so not everyone would look alike. I'm sure it was a beautiful wedding and I'm sure they all looked great. Best wishes to Kim and Kris, I hope they will be happy for many years to come.