"She was central rather than the alternative of being in the front row and along the balcony to the left or right", he added.
"On Saturday, [Harry] could be seen whispering to [Meghan], 'Now, ' indicating when she should curtsy at the appropriate time as the queen returned to Buckingham Palace from the Horse Guards Parade", the source tells ET.
One of the main reasons he does this, according to the report, is because Meghan - as an American and someone who is not of royal blood - isn't familiar with the customs and the protocol that comes with Duchess-forward fashion. During the recent Trooping the Colour ceremony, Meghan got some pointers from husband Prince Harry. The couple recently returned from their honeymoon after tying the knot on May 19.
For the majority of people, the Duchess of Sussex looked absolutely stunning in her bespoke Carolina Herrera dress and matching Philip Treacy hat. She also wore pink for her very first royal outing on May 22, as well as an nearly identical hat.
Back in 2015 then-actress Meghan Markle had travelled to Malta to learn more about her ancestry and sample the flavours of the Maltese islands.
The moment was captured by an eagle-eyed fan and has since gone viral on social media, with plenty of people gushing praise on Prince Harry for helping his wife as she embarks on her new royal role.
What's more, the same critic sneered that he was afraid that the Duchess would bend the rules "just a little too much", and he'd be keeping a closer eye on her.