It appears the NCIS: Los Angeles cast will be getting another new addition.

Actress Daniela Ruah announced today that she and fiancée David Olsen are expecting a baby boy.

"I'm so thrilled about having a baby boy and starting a new chapter as a parent with David," Ruah said, according to People."Its 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, who plays Kensi Blye on the CBS drama, will marry Olsen next year, according to NCIS: LA Magazine. Olsen, a former Navy SEAL, currently works as the stunt double for his younger brother Eric Christian Olsen in his role as Marty Deeks on NCIS: LA.

For his part, Eric Olsen seems very excited for his brother and coworker. Having recently welcomed a son with his wife Sarah Wright, Olsen is looking forward to being an uncle as well as a father.

"I couldn't be more excited about this. Two of my favorite people in the world making a third. Im gonna be an uncle!!" the actor tweeted on Monday.

Ruah, David Olsen, and Eric Olsen can all be seen in the upcoming fifth season of NCIS: LA which returns to CBS on Sept. 24. 

Tags: NCIS: LA NCIS: Los Angeles