watch 01:48 The Loop (TV) Do you like this video? Madelaine Pestch (born August 18, 1994) is an American actress and YouTuber. She is known for portraying Cheryl Blossom on The CW television series Riverdale and Marissa in F the Prom. In The Simpsons, she voices Sloan. Retrieved from "https://simpsons.fandom.com/wiki/Madelaine_Petsch?oldid=899436" Categories: Cast and Crew Guest stars Voice Actors Community content is available under CC-BY-SA unless otherwise noted.