THE reality TV star, 21, took to Twitter to reveal what she just had for breakfast, and it sent social media into meltdown.

Seriously.

last night i had cereal with milk for the first time. life changing.

— Kylie Jenner (@KylieJenner) September 19, 2018

Mind blown.

View this post on Instagram

which lip? wearing TWENTY ONE & BADDIE 💋 @kyliecosmetics

A post shared by Kylie (@kyliejenner) on Aug 29, 2018 at 1:52pm PDT

Not surprisingly, the post very quickly attracted attention from bewildered fans.

Many wanted to know what cereal she usually ate dry, or whether she put the cereal or milk in first. 

Looooolll https://t.co/ovTM0CbbOl

— Kylie Jenner (@KylieJenner) September 19, 2018

Even actor and comedian Seth Rogen poked fun at the star.

Wait till you try peanut butter and jam.

— Seth Rogen (@Sethrogen) September 19, 2018

Who would have thought that milk would cause such a stir?