Lili Reinhart wasn't the one to pop the question to Camila Mendes, but she was just as nervous about her Riverdale costar's engagement as her now-fiancé, Rudy Mancuso.

Catherine Santino is a Style Writer-Reporter at PEOPLE. She began as a contributor for PEOPLE in 2022 and joined the staff full-time in 2024. Her work has previously appeared in The Zoe Report, ...