"I have no idea what kind of film it would be," the ‘Conclave’ actor tells PEOPLE Ralph Fiennes is eager to collaborate onscreen with his younger brother Joseph Fiennes. “He’s a brilliant ...

Ralph Fiennes would love to star alongside his younger brother Joseph Fiennes in a film ... Ralph - who is the eldest of six children - told PEOPLE: "He’s a brilliant actor.

Ralph Fiennes is eager to collaborate onscreen with his younger brother Joseph Fiennes ... a lesson his mother "instilled" in all her children. “My mother, whatever any of her children ...

Claire Greenway/Getty Ralph Fiennes (left) and Joseph Fiennes on Oct. 19 ... Ralph also recalls to PEOPLE a lesson his mother ...