Saoirse Ronan (b. 1994) is an Irish-American actress known for films including The Lovely Bones, Brooklyn and Lady Bird.
Ronan spoke about filming her cameo with Crave Online:
“I was asked to do it, and again it was one of those things where I was like, “What? That’s ridiculous. The Muppets don’t want me to be in thsir film!” But they did, and it was amazing. I turned up, they shot it in London, I think they were shooting everything Shepperton, or Pinewood I think, and I just went in the day before and tried on some tutus and met with the choreographer and we went through some very basic, very dramatic ballet moves. I improvised, you know what I mean? I just went with it, let the move take over. But no, I’m not a ballet dancer. But it was all so quick. I just went in for half a day and then I was just kicked out, it was Ricky Gervais or whoever was working that day.”