NCIS star Michael Weatherly welcomed his second child with wife Bojana Jankovic -- baby boy Liam Weatherly -- on Tuesday, Oct. 29 Credit: David Livingston/Getty Images

It's a boy for Michael Weatherly and his wife! The 45-year-old NCIS actor and 32-year-old doctor Bojana Jankovic welcomed their second child together on Tuesday, Oct. 29.

"Beautiful Bojana gave birth to 10lb Liam Weatherly today, the most important day of the week (NCIS Tuesday 8pm CBS)," the proud father tweeted.

Weatherly and Jankovic married in 2009 and welcomed daughter Olivia, now 18 months, in April 2012. A source told Us in September that the couple is "very excited that they are going to have one of each [boy and girl together]."

Prior to little Liam's birth, Weatherly told Us he and his wife were considering several different monikers. "There are many names being discussed," he said in April. "Some are very controversial. We have some Serbian names and some Irish names. Her heritage is Serbian, mine is Irish. I thought that it might be fun."

Earlier this month, Weatherly shared some insight into his wife's pregnancy via Twitter. "The unbearable anticipation of waiting for a baby to be born is a crazy way to spend your time," he wrote on Oct. 14. "It's possibly linked to weight gain."

The bundle of joy is Weatherly's third child. He is also dad to 17-year-old August Manning, his son with his ex-wife, actress Amelia Heinle. Weatherly was previously engaged to his Dark Angel co-star Jessica Alba from 2001 to 2003.

Weatherly plays Special Agent Anthony DiNozzo on the CBS television series, which is now in its 11th season.