Kate Mara and Rooney Mara star in unison alongside Orlando Bloom and Domhnall Gleeson in Werner Herzog's ripely bonkers fantasia "Bucking Fastard."

Sisters Rooney and Kate Mara learned to speak in unison for Werner Herzog's "Bucking Fastard," something that came "surprisingly" easily for them.

Kate and Rooney Mara, who play sisters with a deep and spooky bond in the German's new film, joined the director for a press conference with co-stars Domhnall Gleeson and Orlando…