Khloe is really a Kardashian after all.

TMZ obtained a declaration Robert Kardashian submitted back when he was trying to get his second marriage to Jan Ashley annulled back in 1999, where he swore that Khloe was his daughter.

"I decided that since I already had four biological children, I did not wish to have any more," he said at the time.

He was looking to have the marriage annulled because Ashley wanted to have more children and he did not.

So it looks like the whole rumor about Khloe not being his real daughter is bupkis. 

Then again, a DNA test would probably reveal more.