The cute couple -- who tied the knot in 2010 -- are already parents to 3-year-old son Sebastian.
The beloved song-and-dance man sat down with ET last year, and opened up about the life-changing experience of finding out he was going to be a dad for the first time, and how that was the same day he was hired by Disney to do the music for Moana.
"Life changed pretty drastically on that day. I actually found out I was going to be a father that morning," Miranda recalled. "My wife was going off on a business trip and I was still asleep, she had to catch an early flight, and she said, 'Hey I think you might be a dad, all right, I'll see you later!' And I was like, 'Great!... What?'"
"I called her when I fully woke up to confirm what she'd said and then I got the call about Disney later that afternoon," he added. Check out the video below to hear more from Miranda about one of the biggest days of his life.
Congrats to the happy couple!