The 33-year-old singer and 35-year-old record producer announced the news Thursday on Instagram. July 31 marks the couple's fourth wedding anniversary, and Keys posted a picture of herself and Swizz Beatz captioned with a special message to her husband.
"Happy Anniversary to the love of my life @therealswizzz !!" she wrote. "And to make it even sweeter we've been blessed with another angel on the way!! You make me happier than I have ever known! Here's to many many more years of the best parts of life!"
Swizz Beatz posted a similar photo on his Instagram and captioned the shot, "Love is life & life is love and we're so excited for another GIFT from up above. Happy anniversary my Goddess. 4 years of greatness & cheers to 100 plus more inshallah."
Keys and Swizz Beatz married on the French island of Corsica on July 31, 2010. The couple already have one child together, son Egypt, who was born in October 2010. Swizz Beatz has three other children from previous relationships.
Keys released her fifth studio album, Girl on Fire, in 2012, and will mentor Team Pharrell on season seven of The Voice. The season premieres September 22 on NBC.