Once again, Rob Kardashian has crossed the line!

The 29-year-old revealed in a video interview that his childhood crush was older sister Kim Kardashian (Ew, ew, ew!!)

MUST SEE: Rob Kardashian Tweets Out Kylie Jenner's Cell Phone Number After Feuding Over Blac Chyna!

After the reality star declared that Blac Chyna had a thing for Latin singer Ricky Martin, his bride-to-be revealed that his former crushes included Jennifer Lopez and his 35-year-old sibling.

"That is also pretty accurate…" Rob responded, blushing.

kim kardashian rob kardashian getty images

Needless to say, fans were a little wigged out by the confession. Rob and Chyna are currently expecting their first child, a girl, together.

Scroll through the gallery below to see throwback photos of the Kardashian clan!