The fastest time to gain one million followers was achieved by K-pop star Kang Daniels, who gained a million followers in 11 hours and 36 minutes, according to the Guinness World Records.
Prince Harry and Meghan Markle'snew Instagram account has gained over 2.4 million followers just 24 hours after it was created. "We thank you for your support and welcome you to @sussexroyal", the couple shared in their first message signing it simply Harry and Meghan. "They are encouraging the couple to not post directly, but rather allow the staff to do that".
Social justice, youth and veterans' empowerment, education and women's rights are at the core of the duke and duchess's values, and are reflected in their royal engagements and patronages. A series of nine photos followed an official slide introducing their Instagram.
For now, Harry and Meghan don't boast the most overall followers - but in a few weeks that could change.
Who held the Instagram follower record before?
The Duke and Duchess of Sussex have a wide circle of friends! "They are not going to have a royal Instagram war on their hands!"
The birth announcement is traditionally placed in front of Buckingham Palace.