The boy, who police say had been locked in a squalid bedroom for at least 18-months and was wearing urine soaked pyjamas when they found him yesterday, is now with the Children's Aid Society.
They say he was malnourished after living on fast food in the garbage-strewn home.
The boy's aunt and uncle are now charged with failing to provide the necessaries of life and forcible confinement.
The two also have a nine-year-old daughter who`s now in the care of the Children's Aid Society as well.
Their names are being withheld to protect the identity of the children.
Police say the boy had lived with his aunt an uncle since coming to Canada in 2010.
They say his parents live outside the country and they`ve been unable to contact them.
The boy was discovered after an anonymous tip to Children's Aid. An aid worker visited the house, but no one was home. She saw the silhouette of the boy through the curtain and called police.
Police said the boy has never been to school and speaks minimal English. He was not born in Canada, they believe. His biological parents are not in Canada at the moment. Police are not releasing the boy's country of origin because it might identify him.
The couple facing charges have a biological child,a nine-year-old girl, who was also living in the house at the time. That child is also now in the care of Children's Aid. Police said there is no evidence that the couple's biological child was confined inside the house.
Police said the boy had access to a toilet and shower, but that the entire house was "filthy."
The boy was fed fast food twice a day, but not usually permitted to leave the room. Police suspect the boy may have been let out of the room briefly in 2013.
In a news release, police said they've had no previous dealings with the occupants of the house. However, in 2007 the Children's Aid Society of London and Middlesex had "brief contact" with the family regarding another child who no longer lives in the home.
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