He began filming his first scenes in April 2013 .
The actor was cast in the role after a successful audition and a callback , in which he acted alongside various actresses to find the right one to play Oscar 's sister .
Oscar began filming Oscar 's first scenes in April 2013 .
The actor was cast in the role after a successful audition and a callback , in which he acted alongside various actresses to find the right one to play Oscar 's sister .