Nathan Matthews has been jailed for life with a minimum of 33 years for killing his stepsister Becky Watts.
Matthews, 28, was found guilty of murdering the 16-year-old in a sexually motivated plot before dismembering her body in the bath.
His girlfriend Shauna Hoare, who was found guilty of manslaughter, was jailed for 17 years.
Nathan Matthews and Shauna Hoare will be sentenced on Friday from 10am after being convicted of the kidnap and killing of Matthews' teenage step-sister Becky Watts.
Matthews, aged 28, suffocated his step-sister while trying to kidnap her from her semi-detached home in Crown Hill, Bristol, on February 19 in what police believe was a sexually-motivated plot with his girlfriend Hoare, 21.
He dragged her body into the boot of his Vauxhall Zafira and drove it to the home he shared with Hoare, less than two miles away in Cotton Mill Lane.
Becky's body was found cut up into several pieces and tightly packaged in a shed nearby in Barton Court. A post mortem examination found she had been suffocated during a "violent struggle", suffering 15 stab wounds and a slash across her stomach which had been inflicted after death.
A jury took just three hours and 27 minutes to convict Matthews of murdering and plotting to kidnap Becky.
They acquitted Hoare of murder but convicted her of kidnap and manslaughter.
Nathan Matthews has been jailed for a minimum of 33 years for dismembering and murdering his stepsister Becky Watts.
The mother of murdered teenager Becky Watts reduced many in court to tears with a powerful victim impact statement.
Becky Watts' killers have "no right to walk God's green earth", her father has told Good Morning Britain.