Alicia Keys, Kasseem 'Swizz Beatz' Dean

Alicia Keys and Swizz Beatz are about to become proud parents again.

Keys, 33, announced that she was pregnant by posting a picture of her sizable baby bump on Instagram late Wednesday night in honor of her wedding anniversary.

See more celebrity baby news

"Happy Anniversary to the love of my life @therealswizzz !!" Keys wrote, along with a picture of the couple. "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!"

The couple, who were married in 2010, are already parents to son Egypt Daoud Dean, 3.

Watch This Tonight — See why Dating Naked is our editors' pick: