Royal experts have debated the issue for months and now it looks most likely that Her Majesty The Queen will be the one to break the happy news.
According to Express.co.uk, while the Duke and Duchess of Sussex have broken with many traditions during the wait for their first child there is one royal rule they must adhere to.
Queen Elizabeth must be the first person to be told about the royal birth, and commentators speculate that Harry and Meghan's wish to dodge the spotlight could well mean the monarch will reveal Baby Sussex' arrival to the public.
After the Queen's announcement, many believe the modern royals will post pictures of their newborn on their newly launched Instagram account, Sussex Royal.
The first-time parents recently issued a statement declaring they will shun the royal tradition of a delivery at the Lindo Wing of St Mary's Hospital in London in favour of a more private maternity location.
The Sussexes will also skip the trademark photo call immediately following the birth in favour of a press shoot in the grounds of Windsor Castle some time after when both Meghan and Baby Sussex are settled and comfortable.
Another rule Harry and Meghan are foregoing is the practice of giving their child a royal title.
Royal fan watchers have been keeping a weather eye for updates since Meghan's mother Doria Ragland arrived in the UK earlier this week.
Some conspiracy theorists believe the happy couple have already welcome their little one.
WATCH the video below to find out why!