Carrie Coon kick-starts a war between old money and new money in creator Julian Fellowes’ latest, must-see costume drama,, when she moves in across the street from aging, wealthy aunts, Agnes van Rhijn (Christine Baranski) and Ada Brook (Cynthia Nixon). While her character is a controlling mother of two older children played by Taissa Farmiga and Harry Richardson, Coon had to hide her real-life pregnancy from the screen. “I got pregnant really early,” she tells ET’s Rachel Smith about her second child with husband Tracy Letts, a daughter she gave birth to during the summer of 2021.