The 50-year-old man and the 46-year-old woman were arrested earlier on Tuesday.
The girl was found dead around 5:30 p.m. on Saturday when police were called to her home in the Toowoomba suburb of Rangeville, about an hour and a half west of Brisbane.
Detectives from the Child Protection and Investigation Unit in Toowoomba then conducted an investigation involving the Homicide Squad and the Child Trauma Unit.
The two men were each charged with one count of murder, torture and disrespect for the necessities of life and were denied bail by police to appear before the magistrates’ court on Wednesday. by Toowoomba.