Kardashian was walking into her perfume launch at the London Hotel in West Hollywood when an unnamed woman rushed onto the red carpet and threw flour over her, to which Kim just laughed, shrugged it off and went inside.
Jenner later wrote on her Celebuzz blog: "I am so proud of my daughter for handling this situation so professionally and with such poise! Kim wasn't fazed by the attack and simply walked away from the red carpet, brushed herself off and headed right back out!!"
"Classy to flour bomb my sister at her charity event helping women," Kourtney Kardashian tweeted of the incident at the fragrance launch benefiting Dress for Success. "I wonder if they would have dared thrown the flour at my hormonal and pregnant self!"
Kim's sister Khloe Kardashian also said that she was "proud of how Kim handled the situation", adding: "I wish I was with my sister tonight. I bet you that woman wouldn't have dared tried a thing."
Kim also wrote on the microblogging website: "Thx everyone who came last nite 2 support my new perfume True Reflection & the amazing women from Dress 4 Success! Last nite was eventful!"
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See footage of Kim Kardashian on the red carpet at the True Reflection launch below (Note: Clip contains some strong language):