Andrew Vrba and Isis Schauer both of Houston...and Briana Calderas of Cabool are accused of killing 17-year old Joseph Steinfeld.
All three are charged with first degree murder and abandonment of a corpse.
Vrba and Schauer are also charged with armed criminal action.
The charges were filed on Thursday.
Steinfeld went missing in early September.
According to a probable cause statement obtained by the Houston Herald -- Vrba told authorities he stabbed Steinfield and with the help of the girls they moved the body outside and burned it. This happened at a home northeast of Cabool.
The Houston Herald also reports 24-year-old Calderas admitted to authorites that the death happened at her home -- but says she didn't want the teen to die.
Both of the women charged in this case claim Vrba bragged about the murder.
We know on social media Joseph Steinfeld went by "Ally Matthew Steinfeld."
A Texas County Prosecutor said the investigation is ongoing.
We will bring you much more on this story throughout the day.