Swizz Beatz and Alicia Keys Swizz Beatz and Alicia Keys

Alicia Keys and her husband, Swizz Beatz, welcomed a baby boy on Saturday, according to a post on the singer's Instagram.

They've named the baby -- who joins big brother Egypt, 4 -- Genesis Ali Dean.

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Keys, 33, posted a "Happy Birthday" note to her newborn son, including a picture of his footprints and the caption: "The joy of joy is joy!! It's a boy!! we are so grateful!! #blessings!!"