Andrew Varela (Arthur), Brooklyn Shuck (Little Bertie/Nina), Jim DeSelm (Michael Barron), Mike Accardo (Nathan), Nancy Voights (Leona Bloom), Olivia Renteria (Teen Bertie), Presley Ryan (Little Cee Cee), Samantha Pauly (Teen Cee Cee), Shoshana Bean (Cee Cee Bloom), Travis Taylor (John Perry), Whitney Bashor (Bertie White)