Anne Hathaway opened up about the daunting script for her new movie Eileen.

During an appearance at Deadline’s Sundance Studio, Anne revealed the reason that she was initially drawn to the “challenging” project.

“I came to this as a fan of Will’s,” the actress admitted, according to Deadline. “I’d seen Lady Macbeth  and like probably a lot of people I thought it was the freshest thing I’d seen in ages. So when the script [for Eileen] came in I was inclined to say yes.”

She shared also shared her initial thoughts about the script: “I actually found the script really challenging the first time I read it. I found it really dark and really funny but it’s a tricky one. It’s so smart. it’s actually unusually smart, so it took me a few reads to feel like I had the beginnings of a handle on it.”