With the royal wedding getting seriously close, the brother of Meghan Markle has sensationally issued a warning to Prince Harry in a brutal letter.

Thomas Markle Jr labels his younger sister “shallow” and “conceited” and even suggests that Harry should rethink his decision to marry her as he thinks she’ll “make a joke” of the royals.

“It’s not too late, Meghan Markle is obviously not the right woman for you,” Thomas, 51, writes in the scathing note shared by In Touch magazine. “As more time passes to your royal wedding, it became very clear that this is the biggest mistake in royal wedding history.

“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.”

Thomas goes on to accuse Meghan, 36, of allowing their father to get into debt by supporting her acting dream and claims he’s still struggling financially.

He also alleges that their dad hasn’t been invited to the wedding, which takes place on 19 May.

“Meg is showing her true colours,” Thomas writes. “It’s very apparent that her tiny bit of Hollywood fame has gone to her head, changing her into a jaded, shallow, conceited woman, that will make a fool of you and the royal family heritage.

“Not to mention, to top it all off, she doesn’t invite her own family and instead invites complete strangers to the wedding. Who does that? You and the royal family should put an end to this fake fairytale wedding before it’s too late.”

Thomas ends his letter by urging Harry, 33, to consider cancelling the nuptials.

“The whole world is watching Meg make bad decisions and choices, it’s not too late Harry,” Meghan’s brother says.

“Meghan is still my sister. She is family. So whatever happens is up to her, whether she wants to forget knowing me or the rest of her family, family comes first.

“Also, you would think that a royal wedding would bring a torn family closer together, but I guess we’re all distant family to Meg.”

Thomas hasn’t seen Meghan since they both attended the funeral of their grandmother in 2011. The former Suits star was still with ex-husband Trevor Engleson at the time.

Prince Harry and Meghan Markle announced their engagement in November after dating since July 2016 and will wed in front of an array of royal and celebrity guests – plus 2,640 members of the public – at Windsor Castle.