South Simcoe Police say a missing girl from Inisfil, an hour north of Toronto, may be on her way to Ottawa.
They say 15-year-old Reilly Armstrong, who's originally from Ottawa, is staying with a host family while studying at a local school there. She was last seen heading to bed around 1 a.m. on Sunday morning.
She's described as female, white, 5'4", 125 lbs with green eyes and long dyed blonde hair. She is possibly wearing blue jeans and a grey and white long sleeved t-shirt.
Anyone with information is asked to contact police.