Daniela Ruah Daniela Ruah

NCIS: LA star Daniela Ruah is pregnant —and engaged — to her on-screen flame's real-life brother!

According to People, Ruah, 29, is expecting with fiancé David Olsen. His younger brother, Eric Christian Olsen, plays Ruah's love interest on NCIS: LA. Their characters, Kensi and Deeks, kissed in the season finale. David Olsen, a former Navy SEAL, acts as Eric's stunt double. Eric and his wife, actress Sarah Wright, welcomed a baby boy named Wyatt last month.

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"I'm so thrilled about having a baby boy and starting a new chapter as a parent with David," the actress told the magazine. "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."

NCIS: LA returns on Tuesday, Sept. 24 at 9/8c on CBS.