The 34-year-old actress announced the exciting baby news via Twitter, and she even revealed her celebrity baby name choice too - letting her fans know she became a mummy to a little girl named Vera Audrey.
'Welcome to the big wide world!', Emilie wrote on social on Sunday evening. 'Vera Audrey de Ravin-Bilitch born March 12th 2016. Couldn't be happier! So in love with our little girl!'
Welcome to the big wide world!— Emilie de Ravin (@emiliederavin) March 14, 2016
Vera Audrey de Ravin-Bilitch born March 12th 2016. Couldn't be happier! So in love with our little girl!ðč‘¶ðčĆ¼ðč’–
Emilie's boyfriend Eric also took to Twitter to gush over their new arrival, writing: 'Madly in love with our gorgeous girl. And her momma is the most wonderful woman on earth! Could not be happier!'
Just three weeks before giving birth, Emilie shared a lovely picture of her baby bump, writing '#truelove'.
The actress, who starred in the hit show Lost, announced she was pregnant on social media too, saying: 'I wanted to share some exciting news...me & @ericbilitch are expecting a baby!! 'Tis truly a dream come true and we could not be happier.'
Emilie in November last year
Sharing his partner's announcement on his Twitter account, Eric added at the time: 'Indeed! We are over the moon with joy! Could not be more excited to be starting a family with @emiliederavin.'
The two started dating last year, and the news of their relationship came out after they were spotted holding hands in the streets of Paris.
The Australian actress, who also found fame in the film Remember Me with Robert Pattinson, was married to actor Josh Janowicz for 11 years. The two got divorced in 2014, but had split up and reconciled a couple of times before.
Emilie is currently playing princess Belle in the American TV show Once Upon a Time. Asked in an interview if she liked Disney heroines when growing up, Emilie gave a surprising answer and said that she was more a Beatles documentary kind of girl.
'No, but I'm really happy being one now. Who else gets to dress up in these incredible outfits we have for work? I didn't really watch the Disney cartoons. I sometimes watched the movies, Mary Poppins, Pippi Longstocking; the classic older movies. And some television, Bewitched, for example.
'I went through a Beatles documentary phase, and I wanted to marry Paul McCartney until my mother explained to me that those movies were from the 60s and he was really a lot older now. I was nine, so it wasn't too hard to accept', Emilie said.
Congratulations to the happy couple!