The singer and his wife Karly are expecting their first kid together.

The couple confirmed to People magazine the baby is due in October (17), and the parents-to-be shared an adorable photoshopped snap of a poster for Alec Baldwin's new animated movie The Boss Baby that reads, "Baby Kirkpatrick".

Karly added the caption: "There is a new boss coming to town in early October..."

"Karly and I are over the moon excited that we are welcoming a new addition to the family," the 45-year-old singer revealed. "We are both looking forward to becoming parents, and learning how much fun having a child will be."

The couple wed in 2013.

His baby will join Justin Timberlake's son Silas and Joey Fatone's daughters Brianna and Kloey as the boy band's offspring.