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...