Paul Archuleta/FilmMagic
Shirley Li
September 16, 2013 AT 04:29 PM EDT

There’s a baby boy on the way for actress Daniela Ruah.

The NCIS: Los Angeles star, 29, tells People she’s expecting her first child with fiance David Olsen, 37, the older brother to Ruah’s co-star Eric Christian Olsen.

“I’m so thrilled about having a baby boy and starting a new chapter as a parent with David,” Ruah says. “It’s amazing how in love I am with this little person I’ve only seen on a black and white screen. I’m starting my own family and there is no other feeling like it.

Ruah is due to give birth this winter.

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