Rent Black Balloon (2008)

When Thomas (Rhys Wakefield) and his family move to a new home and he has to start at a new school, all he wants is to fit in. His pregnant mother (Toni Collette) has to take things easy and Thomas' father Simon (Erik Thomson) puts him in charge of his autistic brother Charlie (Luke Ford). Thomas, with the help of his girlfriend Jackie (Gemma Ward), faces his biggest challenge yet. Charlie's unusual antics take Thomas on an emotional journey that causes his pent up frustrations about his brother to pour out.