Belgravia: The Next Chapter is an original spin-off of Julian Fellowes' 2020 limited series Belgravia, announced in September 2022 and set three decades later in 1871.

The eight-part series was developed and written by Helen Edmundson, with Carnival Films producing for MGM+.

Edmundson and Julian Fellowes served as executive producers alongside Gareth Neame, Nigel Marchant and Joanna Strevens.

In March 2023, it was announced that Harriet Slater would lead the series alongside Ben Wainwright and Edward Bluemel.

Additional cast members joining the production included Toby Regbo, Hannah Onslow, Sophie Thompson, Claude Perron, Sophie Winkleman, and Elaine Cassidy.

Principal photography began in February 2023, with filming locations including London, the Home Counties, and Edinburgh.

The series was directed by multiple directors, including John Alexander, Paul Wilmshurst, and Marisol Adler.