Sarah Snook took inspiration from Taylor Swift when preparing for her role on Broadway

She told The New Yorker of her preparations: "No alcohol, no caffeine. Sleep, sleep, sleep, sleep. And I do my lines at pace on a treadmill, you know."

When asked if she took inspiration from Swift - who previously revealed she would sing her entire set list while working out, Sarah replied: "I heard that and thought: 'That's a genius idea. I'm gonna do that'."

Sarah played the role in London's West End before taking the show to Broadway and she started the UK leg when her daughter - with husband Dave Lawson - was six months old and the actress admits being a new mother helped her stick to her training schedule.

She added: "I think, to be honest, probably just in the framework of living as straight and narrow as possible - that probably wouldn't be possible without a baby.

"It's valuing sleep, needing to keep nutrition up, because she's taking a lot of it from breastfeeding. Keeping myself healthy for being a new mom also kept myself healthy for doing this marathon.

"Otherwise, it's very easy to go: 'Had a big night tonight. Yeah, I'll have a drink. Yeah, I'll have a glass of wine'. And then you're going to bed at five and sleeping until three. With a baby, you cannot do that."

Swift previously explained her tour preparation regime in an interview with Time magazine, saying; "Every day I would run on the treadmill, singing the entire set list out loud. Fast for fast songs, and a jog or a fast walk for slow songs."

She added: "Then I had three months of dance training, because I wanted to get it in my bones. I wanted to be so over-rehearsed that I could be silly with the fans, and not lose my train of thought ...

"Learning choreography is not my strong suit."

Swift also gave up booze while touring, adding: "Doing that show with a hangover,. I don't want to know that world."