We've suspected this for a while!

Prince Jackson didn't exactly put the speculation to rest that late dad Michael isn't his biological father when he got caught up in a Twitter feud with a random Internet troll.

The Twitter user said "everyone knows you are a Rowe-Klein NOT A Jackson!!" so Prince fired back by maintaining that his bond with the King of Pop is what counts.

"The blood of the covenant is thicker than the water of the womb ... I was raised by my dad with my brother and sister," he responded.

Rumors have swirled for years that Prince and Paris Jackson are the biological children of MJ's dermatologist Dr. Arnold Klein and nurse Debbie Rowe, but neither of them has spoken out.