New Zealand Warriors captain Roger Tuivasa-Sheck will switch codes at the end of the 2021 NRL season with the aim of playing for the All Blacks in the Rugby World Cup.

Talismanic full-back Tuivasa-Sheck, 27, has been granted an early release from his Warriors contract to try and force his way into the New Zealand squad for the 2023 showpiece in France.

The 2018 Dally M Player of the Year and two-time Dally M Fullback of the Year expressed gratitude to the Warriors for allowing him to move to the 15-man format.

"This will be my last year with the club and yes, I will be moving to NZ rugby next year," Tuivasa-Sheck said during a press conference on Saturday.

"The club has been supportive in the request and giving me the option to explore.

"Rugby [union] has been the game I've grown up playing. It's always been there in the background. It's always been there, it's no secret. 

"To do it now in a time like this and have the club's support, that's why I chose it now. But rugby is down the line and all that stuff will happen later in the year.

"2021 is my focus, I'm excited about this year and so should the Warriors and NRL fans be.

"There's still a lot of goals I'm chasing [in league] and that's what I'm trying to do this year with the club. We've got a great group here and coaching staff to do something special this year."