Emilie De Ravin is a first-time mother

Actress Emilie De Ravin is a first-time mother.

The Once Upon a Time star, 34, and her boyfriend, director and writer Eric Bilitch, welcomed a daughter on Saturday (12Mar16), and the happy new mother took to Twitter.com on Sunday (13Mar16) to announce their little one's arrival.

"Welcome to the big wide world!," she wrote. "Vera Audrey de Ravin-Bilitch born March 12th 2016. Couldn't be happier! So in love with our little girl!"

The Australian beauty also used social media to share the news of her pregnancy in October (15), writing, "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."

Bilitch then retweeted the message and added, "Indeed! We are over the moon with joy! Could not be more excited to be starting a family with Emilie."

De Ravin and director/writer Bilitch got together in 2014 after her divorce from Joshua Janowicz.

The former Lost actress wed Janowicz in 2006, but filed for divorce just six months later. He was never officially served with legal papers until June 2009.

However, following a trip to Japan in October (09), de Ravin and Janowicz reconciled and decided to give their marriage another go. But their relationship ended for good in July 2014, after Janowicz filed divorce papers citing irreconcilable differences.

In the legal documents obtained by TMZ.com, he noted they had been separated since November 2013.