Alicia, 33, and her husband music producer Swizz Beats, 36, have named their new son Genesis Ali Dean.
Alicia gave birth at 1.52am on Saturday December 27. She announced Genesis's arrival the next day by sharing a sweet picture of his tiny footprints on Instagram along with the caption:
"The joy of joy is joy!! It's a boy!! We are so grateful!! #blessings!!"
"[Egypt] is excited to be a big brother," Alicia told PEOPLE magazine in October. "I think he's super excited because he's not going to be the youngest anymore," she said. "He's always kissing my belly."
Congratulations Alicia and Swizz!