Mädchen Amick portrayed Sherry Tinsdale, Christopher Hayden's ex-fiancé, and mother of his daughter Gigi.


Mädchen Amick (/ˈmeɪdʃən ˈeɪmɪk/ MAYD-shən AY-mik; born December 12, 1970) is an American actress. She is best known for her role as Shelly Johnson on the cult television series Twin Peaks (1990–1991, 2017) and its prequel film Twin Peaks: Fire Walk with Me (1992). She subsequently starred in the films Sleepwalkers (1992), Love, Cheat & Steal (1993) and Scenes of the Crime (2001). Amick currently portrays Alice Cooper in Riverdale (2017–present).