Trivia / Belgravia

• Production Posse: Harriet Walter and Christine Lohr return from Downton Abbey where they played Lady Shackleton and Mrs. Bird, as does composer John Lunn. In the sequel series, Sophie Thompson plays Mrs. Dunn and Gerard Horan plays Mr. Enright, when they were both in Detectorists as wife and husband Sheila and Terry.
• Real-Life Relative: Husband and wife Tom Wilkinson and Diana Hardcastle appear here as in-laws Peregrine Bellasis and Grace Bellasis.
• Self-Adaptation: Julian Fellowes wrote the novel and the screenplay for the miniseries.
• Separated-at-Birth Casting: Jeremy Neumark Jones (Viscount Edmund Bellasis) and Jack Bardoe (Charles Pope) look very similar, which makes a lot of sense because they are father and son and Charles is supposed to look like his father's twin.