The baby was born Wednesday and is the first child for Lachey and her husband, singer Nick Lachey. The couple married in July 2011.
"We are incredibly proud to announce the birth of our beautiful baby boy, Camden John Lachey," the couple said in a statement to People.com Wednesday. "Born today at 6:54 p.m., he came into this world at 8 lbs., 9 oz. and 21 inches. Love has truly been redefined for both of us."