The 22-year-old is recovering at Fiona Stanley Hospital after a driver involved in a high-speed chase with police hit him on November 19.
Mr Camilleri was on his way home from band practice with his friend Max when they were hit by a driver at the corner of Amelia and Main streets in Balcatta.
Mr Camilleri, who was in a coma for a few weeks and is undergoing months of rehabilitation, is recovering slowly.
Sister Emma Camilleri, who started up a fundraising page to help her brother with expenses not covered by insurance, said while her brother physically still had a long way to go, she was grateful for the support received from the community.
“At this stage, my brother is doing well,” she said.
“Each day he progresses in his recovery and is heading in the right direction in regaining a healthy body.
“Specialists predict that Justin will come very close to a full recovery, but he’s got a long, hard road ahead.”
A Greater Union Morley employee, Mr Camilleri’s colleagues will help their mate by holding a special screening of Dirty Grandpa on January 27.
“As my previous workplace, and Justin’s current, we are very appreciative of Greater Union Morley holding a movie fundraiser for Justin,” Ms Camilleri said.
“We thank the staff in advance for the thought, time and energy that will be put into hosting this event.
“Furthermore, we’d like to thank everyone from the bottom of our hearts, for their attendance and donation – we wish you all a good night.”
For more information or to donate visit www.gofundme.com/justincamilleri .