The film expands to theaters nationwide on Friday.
“They just open their mouths and the sound comes out,” she continues.
“Their body doesn’t even shift.

Carey Mulligan as Nell Mortimer in ‘The Ballad of Wallis Island’.Credit:Focus Features/Courtesy Everett Collection
They don’t sit up; they don’t adjust themselves or anything.
That was the only thing, watching Marcus over the years sing with people backstage.
I was like, ‘Oh, that’s interesting.'”

Carey Mulligan as Nell Mortimer in ‘The Ballad of Wallis Island’.Focus Features/Courtesy Everett Collection
This wasn’t the first time Mulligan had sung for an audience.
She provided vocals for Belle and Sebastian’s “Write About Love” in 2010.
“[Wallis Island] was not intimidating.

Carey Mulligan as Nell Mortimer and Tom Basden as Herb McGwyer in ‘The Ballad of Wallis Island’.Alistair Heap/Courtesy of Sundance Institute
I couldn’t have been made to feel more cozy and welcome in this whole setup.
It was just the best and loveliest job.”
“We were familiar with their comedy work,” Mulligan says.

Carey Mulligan as Nell Mortimer and Tim Key as Charles Heath in ‘The Ballad of Wallis Island’.Focus Features/Courtesy Everett Collection
Marcus had Instagram DMed Tim to say what a big fan he was."
“Marcus was so excited,” Mulligan adds.
“Before I even read it, he was like, ‘Well, you have to do it.’

He’s skipped a couple of my films, but he came to the premiere of this one.”


The cast of ‘The Ballad of Wallis Island’.Focus Features/Courtesy Everett Collection