'NCIS: Los Angeles' actress Daniela Ruah's baby came just in time for New Year. Together with her fiancé David Olsen, baby boy River Isaac Ruah Olsen was welcomed last December 30.

"I feel so blessed to have brought him into the world," says the 29-year-old mother to People magazine. Ruah and Olsen first met on the set of her CBS program. That time, Olsen plays the role of a stunt double for Eric Christian Olsen, his younger brother.

Ruah, who plays the role of special agent Kensi Blye, first announced her pregnancy in September. She previously talked about how she felt upon having her ultrasound: "I'm so thrilled about this new chapter as a parent with David. 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."

River Isaac's uncle, Eric Christian, once expressed his excitement for Ruah's pregnancy over Twitter: "I couldn't be more excited about this. Two of my favorite people in the world making a third. I'm gonna be an uncle!"

Last August, the younger Olsen likewise welcomed his own bundle of joy, Wyatt Oliver, with his wife Sarah.