The six-part series will be set in London during the climax of the Napoleonic Wars and will follow the dark secrets of upper-class households.

During the evening of the Battle of Waterloo, the Trenchards accept an invitation to an extravagant ball hosted by the Duchess of Richmond, triggering a sequence of events that lead to secrets being unravelled and devastating consequences for decades to come.

Julian Fellowes will adapt the novel alongside Downton Abbey producers Gareth Neame, Nigel Marchant and Liz Trubridge.

Polly Hill, head of drama at ITV commented: "It's a tale of scandal and intrigue set in 1840s London with some wonderful characters spanning two generations at its heart."

“It’s fantastic to be working again with Julian, a master storyteller,” added Gareth Neame. 

“In Belgravia he has painted a wonderful backdrop of 19th century society against which intrigue and dynastic power struggles will play out.”

Casting for Belgravia is currently underway with filming planned to start in spring 2019.