Actor Christian Brassington, who plays the odious vicar, captioned the on-set picture by describing Front as his “greatest work-mum”.
Also in the picture is Harry Richardson, who plays Drake Crane in Poldark. Clearly Brassington was feeling a little put-out; he described Harry as Rebecca’s favourite “work-son” owing to the fact he played her on-screen child Frank in Doctor Thorne.
Many happy returns to my latest (and surely greatest?) work-mum, @RebeccaFront
Cannot wait for you all to meet Lady Whitworth in #Poldark series four!🖤
Sign up to the Radio Times newsletter for the latest TV and entertainment news