Millie Bobby Brown and Louis Partridge on belly laughs, sibling vibes and Enola Holmes - BBC News

Brown talks to the BBC about having her "hands and heart" all over the detective adventure series.

Image source, Getty ImagesImage caption, Millie Bobby Brown and Louis Partridge return as Enola and Tewkesbury in Enola Holmes 3

It is rare to meet two co-stars whose chemistry is obvious before the interview has even begun but before I ask Millie Bobby Brown and Louis Partridge a single question, they are already laughing together.

As they return for Enola Holmes 3, they say that off-screen friendship has helped them bring more ease and affection to Enola and Tewkesbury's developing relationship.

"We realised we don't do much prep for some of the scenes - we learn our lines and rehearse and it's not that we don't take it seriously but we're really able to be in it," Partridge says.

Brown laughs as she jumps in, turning to Partridge with the kind of mock-seriousness that suggests this is a familiar routine between them.