 Marlon Brando (qv) wanted to make Don Corleone look "like a  bulldog", so he stuffed his cheeks with cotton wool for the screen  test. For actual filming, he wore an appliance made by a dentist.  Al Pacino (qv) wore a foam latex facial appliance that covered his  entire left cheek and was made up with colors to match his skin tone  and give the effect of bruising. This was to simulate the effect of  having his jaw broken by Captain McCluskey. Brandos mouthpiece is  on display in the American Museum of the Moving Image in Queens, New  York.