As the rest of the world focuses on the upcoming union of May 19, Greer was already envisioning a royal separation and didn't rule out a divorce, saying "they're everywhere" in the royal family.
But Greer seemed confused, or at least to feel that the common enemy in the situation was "the firm", and not Harry or Meghan.
In terms of the style she thinks Markle will go for, "I think that she'll wear a very fitted gown that flares away from her mid-thigh, [with] a lovely V neckline, long lace sleeves, buttons from the wrist to the elbow... all handsome couture touches".
ET Canada caught up with internationally renowned United Kingdom wedding dress designer Caroline Castigliano, who offered her thoughts on what type of glamorous gown she thinks Markle, 36, will be walking down the aisle in at Windsor Castle on May 19.
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The "Walking Away" hitmaker said: "Listen, if I got invited to witness one of the most biggest talking points of modern history when it comes to the royal family, it would be incredible to be there".
He said: "The emphasis will very clearly be on guests that Harry and Meghan know themselves".More news: United Kingdom appears to be 'destroying' evidence in Skripal case - Russian envoy
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They are scheduled to be Wednesday at Windsor Castle on May 19 and more than 2,500 people have been invited to attend the event.
Tyler and TJ are the sons of Meghan's half-brother Thomas Markle Jr.
A host of glamorous pals including tennis supremo Serena Williams and Made in Chelsea's Millie Mackintosh are expected to attend the Royal Wedding.
"She will see vistas of boredom that are unbelievable. I can't think of a single reason", she said.
"Yes", replied Beckham, adding: "I think England is so excited, I mean, it's so great isn't it, they look so happy".