Courtney Henggeler (born December 11, 1978) is an American actress known for her starring role as Amanda LaRusso in the Netflix drama web television series Cobra Kai. She is also known as playing the adult version of Sheldon Cooper’s twin sister, Missy, in The Big Bang Theory.

She is the daughter of Nicolás Dueñas and studied in the Teatro de La Abadía of Madrid.