The couple's official account took five hours and 45 minutes to reach the milestone after its launch on Tuesday. The implication is clear - they'll be using one of the most popular social media platforms in the world to spread their message.
Kang Daniel launched his Instagram on New Year's Day, knocking Pope Francis's record of 12 hours out of the record books. "Keep up the great work!" a fan said in the comments section of the couple's Instagram account.
It has since grown to 2.6 million.
Guinness World Records said on Wednesday (Thursday NZ time) that a new Instagram account opened by Prince Harry and his wife Meghan Markle is the fastest-ever to gain 1 million followers. In the very first post shared by the dynamic duo, the future parents posted pictures from their travels, including their recent royal tour, as well as a few shots of them supporting a range of causes.
It "will ensure that permanent support arrangements for the Duke and Duchess's work are in place as they start their family and move to their official residence at Frogmore Cottage".
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The news comes after it was reported that Prince Harry and Meghan are creating an eco-friendly and gender-neutral nursery at their new Windsor home, Frogmore Cottage, which is now undergoing extensive renovation work.
This account is her first presence on social media since joining the British royal family.
As Radar reported, Meghan recently shut down a secret Instagram account she had created to follow friends and others without anyone knowing.
More than often social media accounts led by couples get their fair share of criticism by annoyed friends or followers with distaste for sappy images and captions. Her Facebook page had nearly 800,000 likes.