Meghan Markle has revealed a big clue about the royal baby's potential name ...

Meghan Markle is expecting her first child with husband Prince Harry any day now ... and while we eagerly wait for news of the royal arrival, we can't help but speculate about the gender and the name the couple will give their bundle of joy.

But thanks to a recently unearthed interview with the 37-year-old former actress, we've all just been given a big clue about what they might name their baby, should they have a baby girl.

Speaking with HELLO! magazine in 2015, the Duchess revealed she's already bought a gift for her future baby girl - a Cartier Tank Française watch - and that she had the timepiece engraved with some initials.

"When I found out Suits had been picked up for our third season – which, at the time, felt like such a milestone – I totally splurged and bought the two-tone version [of the watch]."

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"I had it engraved on the back, 'To M.M. From M.M.' And I plan to give it to my daughter one day. That's what makes pieces special, the connection you have to them."

During their royal tour of New Zealand and Australia last year, the soon-to-be-parents revealed they had a "long list" of name options from royal advisors.

While many royal fans are hoping the pair has a daughter and calls her Diana after Harry's late mother, we're thinking Mary could now be the obvious choice!

Not long 'til we find out for sure!