A 15-year-old Argentinian girl had her face and back slashed by two sisters who felt she was too pretty and wanted to make her look like horror movie icon Chucky.

Gut-wrenching photos of a mutilated Julia Alvarez were posted on Facebook by her sister Yeni because initially police did not want to get involved, newscom.au reported.

"Everyone says you are pretty. You won't look pretty when we have finished with you. People will call you Chucky," the twisted, jealous sisters told Julia, according to reports.

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Chucky is the scarred slasher serial killer doll that debuted in 1988 in horror movie Child's Play.

The savage attack started with kicks and punches and when Julia hit the ground the knives came out, stabbing and carving her face and body

"They were jealous of my sister for a long time and always abusing her and insulting her, but we never expected them to go this far," newscom.au quotes Yeni.

"They have ruined her life. She says she wants to kill herself because when she looks in the mirror she is so ugly now. It has ruined our family."

Police now say the suspects -- 16-year-old Maria and 18-year-old Flor -- have been questioned.

The younger girl was released but her older sister remained in custody.