The former Girls Aloud star and her fiancé Jason Bell have welcomed their first child into the world and announced the happy news on Twitter yesterday (10.02.14).
The singer told followers: "I am overjoyed to let you know our little girl is here. She is amazing! I love being a mammy & will fill you all in soon. Love Nadine Xx. (sic)"
The 28-year-old star was initially shocked when she realised she had fallen pregnant and expected one of her Girls Aloud band mates - which includes Sarah Harding, Kimberly Walsh, Cheryl Cole and Nicola Roberts - to have a baby first.
Cheryl was quick to congratulate the couple and tweeted: "It is OFFICIAL!! There is a baby Aloud!!!!!! Congratulations @nadinecoylenow & Jason so amazing!! (sic)"
Nicola also added: "There is a little baby Aloud! Congratulations @NadineCoyleNow & Jason on your little baby Girl. I'm so happy she's here and healthy <3 xo. (sic)"
The pair started dating in 2008 and Jason, a former American footballer, popped the question over Christmas.
It is the second time the couple have been engaged, after the first ended in June 2011 because Nadine wanted to focus on herself before committing to marriage.
The brunette beauty told fans she was expecting a baby last summer and later confirmed she was back together with Jason, 35, after speculation over who the father was.
Nadine announced they were expecting a baby girl together on New Year's Day and posted a photograph of a duck-shaped balloon from her baby shower with the message: "It's a girl!" on her Instagram account.