Madelaine Grobbelaar Petsch 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 a real-time unfolding crisis of viral human transformations, a neuroscientist unknowingly becomes the prime subject of a covert operation—where escalating stress is deliberately weaponized to trigger the next stage of human evolution.
