England defence coach John Mitchell has signed a two-and-a-half-year contract extension that will see him work with the squad through the 2023 World Cup.
The former All Blacks coach joined Eddie Jones' coaching staff in 2018 and was key in neutralising the New Zealand's attack in the 2019 Rugby World Cup semi-final.
"I'm really happy to sign this contract extension," Mitchell says. "I'm thoroughly enjoying my time here with England, and working with such a talented group of players, coaches and staff.
"It takes a long time to really build these relationships and I wanted to continue to carry on the work that we're all doing to achieve just what we're capable of here with England.
"I also think it's the right place for me to evolve and challenge myself as a coach. I'm learning all the time, and that's only going to help me to improve the players and contribute more to this team."
England begin their defence of the Six Nations title on Saturday, when they host Scotland at Twickenham Stadium.
The 2023 Rugby World Cup will be held in France.