Laura Linney becomes first time mom at 49

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Laura Linney sure knows how to keep a secret!

The actress, 49, recently became a mom after giving birth to a baby boy on Wednesday, Jan. 8, her rep confirms to PEOPLE exclusively.

Son Bennett Armistead Schauer is the first child for Linney and her husband Marc Schauer.

The couple became engaged in 2007 and were married in May 2009.