Knight had previously represented Berkshire, having gone down the Devon route, and captained Western Storm to two Kia Super League titles in the regional system. She was appointed to the Somerset board in an advisory capacity earlier this year.
“Somerset is a club that holds a special place in my heart so I am incredibly excited about this opportunity,” Knight said. “The South West has played an integral role in my journey and it is a privilege to be able to represent the region that means so much to me.
“We have a genuine opportunity to create something special. This is the first Somerset women’s team of the professional era, and we have a duty to those who came before us and laid the foundations to ensure we are a team that competes on the field and inspires to young people across the region. There is a special legacy surrounding the club and that is something we will take very seriously.
“The Cooper Associates County Ground is a special place to play and I can’t wait for some of the younger players to experience the atmosphere that members and supporters can generate. The Taunton crowd is passionate and knowledgeable and we will do our best to we can to win cricket matches and give them something to celebrate.
World Cup winner Knight has captained England in all formats since 2016 and is currently leading the team on their tour of South Africa.
Somerset Women’s head coach Trevor Griffin said: “Heather is a player I have worked with for many years and I am delighted that she will play for Somerset when her England commitments allow. She is a true professional who impacts games. both on and off the pitch and is an invaluable addition to any team.
“I’m sure our supporters will be looking forward to seeing Heather in a Somerset shirt and winning cricket matches for us.”
Somerset director of cricket Andy Hurry added: “Heather is a world-class performer who has proven herself on the world’s biggest stages. She is highly respected inside and outside the game, and the experience she can share both inside as well as off the field he will have a great impact on the team, the club and the region.
“It is an honor to have the England captain committed to the club and there is no doubt she will inspire future generations of Somerset players, members and supporters.”
