Naomi Watts’ family is about to get another addition!

The actress, 39, has entered her second trimester with her second baby, Us Weekly reports in its newest issue, on newsstands now.

But don’t expect a huge announcement: When she was pregnant last year with her first child, her beau, Liev Schreiber, 40, didn’t confirm it until he casually told Conan O’Brien, “Yes, I’m going to be a dad.”

The couple — who met on the set of the 2006 drama The Painted Veil and have homes in NYC and L.A. — welcomed son Alexander in July 2007.

Of course, should Watts feel like talking about the pregnancy, she’ll have a sympathetic ear.

Her best friend, fellow Aussie Nicole Kidman, 41, is expecting early this summer.

Watts’ rep tells Us she doesn’t comment on her client’s personal life.

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