'Lost' star Evangeline Lilly has found herself a new role: Mommy.

The actress, 31, gave birth to her first child, a baby boy.

The father is her boyfriend, Norman Kali, who was reportedly employed as a production assistant on the crew of the ABC hit series.

Lilly was previously in a relationship (2004-'09) with 'Lost' co-star Dominic Monaghan.

Details about the new baby are few, as the notoriously private TV star has not spoken to the press about her pregnancy or the birth.

It was only toward the end of her pregnancy that she was first spotted with a baby bump, as she was photographed running errands last month in a flowing maternity sundress near her Oahu, Hawaii, home.

Now that she's a mom, bedtime stories should be extra fun in Lilly's household, as she revealed in a late-night interview with Craig Ferguson last year that she was the proud author of a children's book: 'The Squickerwonkers.'