The musician admits he feels "blessed" with the knowledge he is going to be a dad, reported Female First.
Posting a photo of him with his wife, who is holding her stomach, on Instagram he announced, "Izzy and I are so happy and feel truly blessed to be able to share with you that we are expecting our very own little miracle #BabyJudd @izzyintheattic (sic)."
Judd and Johnston, who was the violinist in classical group Escala, met when she performed as part of the string section on McFly's 2005 tour.