The 36-year-old singer says that Katherine told him the good news as soon as she found out.
He explained that he was on the road and had just woken up at a hotel but, “was so pumped I flew right home! She told me right when she knew.”
Josh added that their four-year-old daughter Adelaide and seven-year-old daughter Naleigh are super excited for the new addition to the family.
“They ask about the baby all the time. Adalaide asks more than Naleigh because she’s so curious. [She’s] 4…and she thinks the baby is supposed to be here tomorrow, and it’s hilarious,” he told People.
Josh also expressed that he can’t wait to meet his “little golfing buddy,” but he’s a little concerned about changing his diapers. “I’ve only changed diapers for girls my whole life, so I don’t know. I’ll have to learn that world a little bit!”