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 his girlfriend Shauna Hoare never showed any remorse for the "grotesque" murder of Becky Watts.
Senior Investigating Officer Detective Superintendent Mike Courtiour said: "Nothing will ever fill the void left by Becky’s murder.
"But I hope the sentences passed down today will bring some comfort to her family, and the wider community who have been affected by these horrific events.
"Matthews and Hoare have never shown any remorse for their grotesque actions and today’s sentence reflects their refusal to take full responsibility for their callous crimes.
"Our thoughts remain with Becky’s families and friends who have suffered unimaginable pain and distress over the past nine months."
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.