The pregnant Duchess was all smiles as she met everyone on the set, ranging from writer and show creator Lord Julian Fellowes, executive producer Liz Trubridge, makeup artists at work, costume designers, seamstresses and cutters in the workshop, to the people behind the design and production process of set scenery and props, reported Ace Showbiz.
In addition to those people, Middleton made time to greet a bunch of the series' stars, including Phyllis Logan, Robert James-Collier, Lesley Nicol, and Sophie McShera.