The actress, who's currently starring in the British TV series "Riviera," gave birth to her first child, Summer Newcomb Cook on Monday. And she's already given us a tiny glimpse of the little one, who's clearly got a grip on this whole being born thing. The baby's father is Stiles' new husband, Preston Cook. The actress, 36, met Cook while working on the feature "Blackway" (originally titled "Go with Me") in 2015. Cook is a camera assistant. As she told TODAY in June, "He's just a really good man."