By John Mitchell
Updated April 05, 2013 at 06:23 PM EDT

NCIS star Michael Weatherly’s got another baby on the way!

Weatherly and his wife, Bojana Jankovic, are just one week away from celebrating the first birthday of their daughter, Olivia, and are already expecting baby No. 2 this fall, the actor tells Entertainment Tonight.

“We’re expanding the brand and so I am pleased to announce … Bojana and I are indeed awaiting our second child,” he said. “We’re very excited. We will find out [the baby’s sex], but my wife doesn’t even know I’ve told you.”

Weatherly has a 17-year-old son, August, from a previous marriage.