Always Remained In Character
Throughout the film, Streep used method acting. She kept in character as Miranda Priestley even when the cameras weren’t rolling. She kept her co-stars Emily Blunt and Anne Hathaway at a distance, even being chilly to them at times because that’s what her character does to their characters.
Not The Most Fun
According to Entertainment Weekly, Blunt said, “Meryl is so gregarious and fun as hell, in some ways it wasn’t the most fun for her having to remove herself. It wasn’t like she was unapproachable; You could go up to her and say, ‘Oh my God, the funniest thing just happened,’ and she’d listen, but I don’t know if it was the most fun for her to be on set being that way.”