The Keeping Up With The Kardashians stars are in Australia to promote their new capsule collection with Forever New but it seems not all locals are happy to see them.
According to TMZ, the unnamed woman threw the eggs from a balcony above where Kendall and Kylie had been meeting fans and signing autographs. Neither girl was hit as the eggs missed their target and ended up splattering on the floor.
The website claims police witnessed the incident and arrested her for offensive behaviour.
Kendall, 20, and Kylie, 18, didn't seem too phased by the incident as they continued the meet and greet, chatting with admirers and snapping plenty of selfies of the huge crowd.
Some fans had been waiting for a whopping 36 hours for their chance to meet the American duo, with one girl telling the Sydney Morning Herald she'd slept out the night before to ensure she was first in line.
Apparently admirers were not allowed selfies with Kendall or Kylie.
All you need to know about Kylie Jenner: