Niamh Wilson ( /ˈniːv wɪlsʌn/ born March 9, 1997) is a Canadian film actress and television actress from Oakville, Ontario known for her role as Corbett in Saw III, reprised in Saw V, the Canadian horror film The Marsh (film) (2006), and the title role in the Family Channel series Debra!.She was a regular on Degrassi Season 13 and 14 as Jacqueline "Jack" Jones.