"Amy and I are so excited and feel so blessed," says the "Just Got Started Lovin' You" singer. "I am overwhelmed with joy at the idea of becoming a father! This is truly going to be an amazing, life-altering experience."
The Grammy nominee, who was part of Nashville's MuzikMafia, along with pals Big & Rich and Gretchen Wilson, says the baby is due in August.
The baby will have an impressive country pedigree on both sides of his family – Otto's brother-in-law is Rascal Flatts's member Jay DeMarcus. The two artists' wives are sisters.