The singer took to Facebook to share the baby news with fans and followers shortly after little Zeke was born, revealing his newborn son shares the same birthday as his late mother-in-law, who lost her battle with cancer in February (15).
He wrote, "(Son) Koa got his wish when his baby brother Zeke was born this morning at 7.49am weighing 7lb 13oz. Sharing the same birthday as Jodi's mum Eileen, the 21st of May. Both Jodi and Zeke are doing great. We are all so happy and so in love with him."
Egan announced his wife's pregnancy by posting a video of his three-year-old son breaking the news on his Instagram page.
The little lad said, "Mummy's got a baby in her belly and I'm going to be a big brother."
The pop singer wed the actress in Barbados in 2008 after a five-year romance.