Mädchen Elaina Amick ( MEHD-chən AY-mik; born December 12, 1970) is an American actress. She is known for her starring role as Shelly Johnson on the cult television series Twin Peaks (1990–1991), its prequel film Twin Peaks: Fire Walk with Me (1992) and its revival television series Twin Peaks: The Return (2017). She was also a series regular on Central Park West (1995–1996), Freddie (2005–2006), and Witches of East End (2013–2014). In film, she had starring roles in Sleepwalkers (1992) and Dream Lover (1993). She currently portrays Alice Cooper on The CW's drama television series Riverdale (2017–present).