Most of these are pretty ridiculous and unbelievable, and a couple I just really don't want to believe!
The theories include that Prince Harry is only marrying Meghan Markle as part of a British ploy to take control of America again! I don't see how marrying one random American is going to make that a possibility, haha! Another is that the Royal Family is all actually alien lizards in disguise, but then I'm wondering how they reproduce if they're marrying "commoners"?
There are some older theories too, like Jack the Ripper was actually the prince at the time. Click the link in the tweet below to read more about each theory, and some other crazy theories you won't believe!
(The Princess Diana theory is the one I definitely do not want to believe.)