The 34-year-old “A Thousand Miles” singer posted a photo of himself with their baby girl on Tuesday (January 13).
“Sid the Kid, whoa!!!” John captioned the Instagram photo. His record label also tweeted the news to congratulate the couple.
“There’s a new mama and papa on the block! Huge congrats to John McCauley and Vanessa Carlton on their baby girl!!! Welcome to the family!” the label said on Twitter.
See the picture of the newborn baby below!