- The film is based on the The Saxon Stories by Bernard Cornwell. It acts as a sequel and conclusion to The Last Kingdom television series.
- Principal photography began in Budapest in January 2022 and wrapped by the end of March 2022.
- The producer of this film Nigel Marchant revealed that talks about a film had been proceeding following the launch of The Last Kingdom’s fourth season in April 2020.
- It was given the working title Seven Kings Must Die and would follow events of the series which took place over a circa-45-year period of history from 866 onwards focusing on the Kingdom of Wessex and ongoing Viking incursions into England.
- The Last Kingdom: Seven Kings Must Die was released on 14 April 2023 on Netflix.