Guest Stars Martin Cummins as Tom Keller Barbara Wallace as Rose Blossom Ryan Robbins as Frank Andrews Tiera Skovbye as Polly Cooper Christopher O'Shea as Percival Pickens Matthew Yang King as Marty Mantle Oliver Rice as Lou Cypher Kyra Leroux as Rivervale Britta Beach Shannon Purser as Rivervale Ethel Muggs Co Starring Trevor Stines as Jason Blossom Hannah Bos as Young Betty Hamza Fouad as Raphael Uncredited Camila Mendes as Rivervale Veronica Lili Reinhart as Blessing Cooper Cole Sprouse as Rivervale Jughead Cole Sprouse as James Jones Cole Sprouse as Bunker Jughead Madelaine Petsch as Charity Blossom Madelaine Petsch as Nana Blossom K.J. Apa as Asher Andrews Erinn Westbrook as Rivervale Tabitha
