Alexa Jacqueline Skye Idelchik Swinton (born July 2, 2009) is an American actress, singer and songwriter. She appeared in a lead role as Piper in the 13-episode ABC Prime Time series called Emergence, has a recurring role as Eva Rhoades in Billions, and the HBO series And Just Like That..., where she plays the character of Rock Goldenblatt. She appeared in M. Night Shyamalan's Old, playing the role of Young Maddox.