Thomas Markle Jr. has penned an open letter to the prince, telling him that Meghan is "obviously not the right woman" for him.
In the letter, shared with In Touch Weekly, he wrote: "As more time passes to your royal wedding, it became very clear that this is the biggest mistake in royal wedding history.
"Meghan Markle is obviously not the right woman for you. I'm confused why you don't see the real Meghan that the whole world now sees. Meghan's attempt to act the part of a princess like a below C average Hollywood actress is getting old.
"What kind of person starts out by using her own father until he's bankrupt, then forgets about him in Mexico leaving him broke, over mostly all her debts. And when it's time to pay him back she forgets her own father like she never knew him. It's very apparent that her tiny bit of Hollywood fame has gone to her head. Not to mention, to top it all off, she doesn't invite her own family and instead invites complete strangers to the wedding.