Kierston Wearing was cast as Mia's mother Joanne "I loved Kierston the minute I set eyes on her and left I had known her all my life," says Arnold.

Kierston embraced the style of working. "I love Andrea's way of shooting, that’s how I worked with ken Loach, so it was great to have the opportunity to do it again."

Katie adds "In some ways I think it was good, not telling us the story in advance, because you try and put the story together in your head yourself and bit by bit was slowly working it out."

"It was great working with Kierston," says Fassbender. "She's very no nonsense and when I first saw her I thought she looked like Brigitte Bardot. She's got this very interesting quality to her, she's very got this sultry, sexy rawness to her and she's very free and easy to work with."

"Michael is so down to earth and lovely and normal, there wasn't a barrier in terms of his film experience versus anyone else's," says Kierston.