It’s a sunny September day in New York City and Jessica Biel is thinking of pastries. The actress is quietly running lines while sitting on the floor of the lavish Upper West Side penthouse set of her upcoming Prime Video thriller series,

Succession” creator Jesse Armstrong’s satirical drama “Mountainhead” and Elizabeth Banks and Jessica Biel playing

The actresses tell PEOPLE about bonding on set over their sons Jessica Biel and Elizabeth Banks hadn’t worked together before The Better Sister, but the chemistry came easily between them. It was almost “weird,