RELATED: Best Picture Mix-Up Isn't the First Time Someone Opened the Wrong Envelope at the Oscars Now, Pricewaterhouse Coopers, the accounting firm that oversees Oscars' voting, has confirmed to ET exactly how Beatty and Faye Dunaway ended up with the wrong envelope: one set of envelopes was stationed on each side of the stage, manned by two Pw C reps, Martha Ruiz and Brian Cullinan.