And every appearance they have made together since has excited royal fans.
But this week various reports have emerged of growing tension between the two young couples, which Kensington Palace has refused to deny.
Meghan, 37, was yesterday accused of making Kate, 37, cry in the run-up to her wedding in May.
And hours later, a royal source claimed the former actress has also driven a wedge between brothers Prince Harry, 35 and Prince William, 37.
A supposed split between the brothers is also said to be the reason why Meghan and Harry have decided to set up house at Fogmore Cottage in Windsor rather than an apartment next to William and Kate at Kensington Palace.
And the royal family has stayed silent concerning all rumours.
When contacted by Daily Star Online, both Kensington Palace and Buckingham Palace said they would not be commenting on any of the stories.
PR expert Nick Ed rubbished reports of any feud between Meghan and the other royals while explaining it was perfectly normal for the palace to stay silent.
“The palace doesn’t need to respond to any type of rumour like this – the relationships between the families is, of course, fine,” Mr Ed told.
The royal family has stayed silent on a number of major scandals – most notably the very protracted marriage breakdown of Prince Charles and Princess Diana.
“We don’t comment on Prince William’s private life,” they said in a statement issued to the press.
It’s a rule that has been followed when it comes to Meghan’s extended family, with Kensington Palace refusing to respond to repeated jibes in the press from her half-sister Samantha Markle.
But the rule not to comment on personal matters has been broken twice in the last two years – both in response to stories about Meghan.
“We won’t comment”
In November 2016, Harry’s communications team issued an extraordinary statement confirming his new romance with Meghan and calling on the press to back off the couple.
Royal commentators predicted the rare statement was proof the relationship was serious – something that was proved right a year late when Harry and Meghan were engaged.
After Meghan’s father Thomas Markle found himself embroiled in a fake paparazzi photo scandal just days out from their wedding, Kensington Palace issued another statement.
“Sadly, my father will not be attending our wedding,” Meghan said in the statement.
“I have always cared for my father and hope he can be given the space he needs to focus on his health.”