NCIS: Los Angeles actor Eric Olsen has a lot to smile about these days – a hit show, a beautiful wife, an adorable son, and now another baby on the way!

Olsen took to Instagram with the announcement, sharing a sweet photo of his wife and son with a humorous caption. “This picture is either one of two things: Wyatt fully embracing and loving his impending new baby sibling. Or he is trying to push them both down a steep embankment, in a last ditch effort to preserve sole ownership of his train set.”

Olsen married his longtime girlfriend, Sarah Wright, in Wyoming on June 23, 2012.  Their son Wyatt was born in 2013.