She originally auditioned for a different role on Chilling Adventures of Sabrina.
Yup, Gabrielle almost wasn't Prudence at all! The actress originally auditioned for the role of Sabrina Spellman's best friend, Rosalind "Ros" Walker but was asked to come back in and read for Prudence instead.
"It was my first time at trying a more antagonistic or villainous role, and I had always said that it was my dream to play a villain," Gabrielle recently old W Magazine. "I love the idea that [Prudence is] not your typical teenage mean girl."