Beyonce and her husband Jay Z say they "have been blessed two times over", with the couple announcing that she is pregnant with twins.
"We are incredibly grateful that our family will be growing by two," the pair wrote, and "we thank you for your well wishes".
She announced the news by releasing a photo of her with a baby bump, wearing a veil.
The couple already have a daughter, Blue Ivy, who has just turned five.
Beyonce has been nominated in nine categories for the 2017 Grammy Awards, extending her lead as the most-nominated woman in Grammys history.
The happy announcement gave no hint of when the babies will arrive.