Jason Castro and Madeline
Courtesy Jason Castro
08/04/2011 at 05:00 PM EDT
It's time for singer-songwriter Jason Castro to brush up on his lullabies.
The American Idol
alum and his wife Mandy welcomed a baby girl, Madeline Emilia Castro, on Sunday, he confirms to PEOPLE.
In April, Castro shared on his website
that he and his wife were expecting a baby
, saying, "We just found out yesterday that it is going to be a girl! That makes me laugh … what am I going to do with a sweet little girl?! Probably just smile a lot … I cannot wait!!!"
This is the first child for the couple, who married in Jan. 2010
Reporting by JESSICA HERNDON