Royal baby chatter is naturally a trending topic on social media after Meghan Markle and Prince Harry announced they are expecting their first child – with a host of congratulatory posts from the Armed Forces joining in.
The Queen congratulated the Duke and Duchess of Sussex and posted a tweet from her official @RoyalFamily Twitter account.
There has also been a flurry of tweets from the British Army, Royal Air Force, Grenadier Guards and other social media pages with an association to the British Armed Forces as #RoyalBaby became a top hashtag.
The military tweets were among many from celebrities and royal fans around the world.
A post from the British Army was among the first to celebrate the news following the royal announcement:
The British Army in London decided the announcement required a little more fanfare as it posted its ‘warmest congratulations’ to the Harry and Meghan:
However, the Grenadier Guards, The Corps of Drums, upped the stakes with a stirring musical post and a blast of military music, saying that the news of the #RoyalBaby had spread to South Sudan:
It followed an earlier tweet by the Grenadier Guards with a simple congratulations:
Harry and Meghan announced the news to the Queen that she would be having her eighth great-grandchild next spring before the announcement was made public.
The royal couple have been all smiles as they touched down in Sydney for this year’s Invictus Games as part of their first international tour since they tied the knot in May.
The official Invictus Sydney announced that the team was looking forward to hosting the royal couple during the games as it offered its own congratulatory post:
The Duke and Duchess of Sussex’s first child will be seventh in line to the throne, bumping Harry's uncle the Duke of York into eighth place in the line of succession.
There is already speculation on the baby’s possible names.
William and Kate chose royal favourites for their children.
But will Harry and American-born Meghan go classic or break the royal mould when naming their baby?
If they stay traditional, something like Alice, Mary, Elizabeth or Victoria for a girl, and James, Philip, Frederick or Arthur for a boy are possibilities.
In the US, the most popular name for a baby girl is Emma and Liam for a baby boy.
The royal couple are unlikely to go with a suggestion from Defence Photography, however:
In case any Londoners missed the announcement or the frenzy on social media, BT Tower made sure the news got out:
The official announcement was made by Kensington Palace on Monday morning, and many were quick to comment on the short time since the couple's wedding in May this year.
Writer and broadcaster Gyles Brandreth wrote on Twitter: "They don't hang around in Sussex, do they?"
"Harry ain't wasting any time," said Geordie Shore star Gary Beadle.
The popular @Queen_UK parody account also got involved, tweeting: "Already?! #royalbaby."
Others made reference to the Duchess' career as an actress on the American drama Suits.
"There's only one man that can be the Godfather," wrote presenter Ben Sheppard, accompanying the tweet with a gif of the show's Harvey Specter, played by Gabriel Macht.
Meanwhile some joked about the timing of Meghan's due date - with the couple's first baby set to arrive shortly after the day Britain is scheduled to leave the European Union.
"Please let it be March 29th," wrote BBC News presenter Simon McCoy.
The Royal Air Force, Joint Helicopter Support Squadron, offered a cheeky congratulations, telling the royal couple to remember their motto if they need any help in seven months, ‘Together We Deliver’.
Prime Minister Theresa May was quick to send her best wishes to the happy couple.
She wrote on Twitter: "My warmest congratulations to the Duke and Duchess of Sussex on the happy news they are expecting a baby in the Spring. Wishing them all the best."
Justin Welby, the Archbishop of Canterbury, also congratulated the pair, tweeting: "Congratulations to the Duke and Duchess of Sussex on their happy news! Prayers for them in the months ahead."
The Kingdom Choir, which thrilled the country as they performed at Harry and Meghan's wedding in May, were also among the well-wishers on social media.
"We'd just like to send our congratulations to the beautiful couple, the Duke and Duchess Of Sussex on their recent announcement," read a message on the choir's official Instagram account.
Kensington Palace followed the announcement by thanking the public for "all of the support" the couple have received since their wedding, adding that they were "delighted to be able to share this happy news".