The singer started off with the news. "We would like to share our love and happiness. We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes. The Carters, " she posted.
Beyoncé and her superstar husband Jay Z are parents to five-year-old daughter, Blue Ivy.
The couple married in 2008.
The family's news set social media on fire with the Beyhive (as her diehard fans are known) buzzing about the new heir and spare. Twitter reported more than half a million tweets about Beyoncé in the first hour after her big reveal.
The mom-to-be took to the internet to share fun photos of her growing baby belly, And the beautiful backdrop was almost as stunning as the gorgeous bump.
Beyoncé is nominated for nine 2017 Grammy Awards and is expected to attend the ceremony on February 12. She is also scheduled to headline the Coachella music festival in April.