The actress – who was first seen as the Doctor’s mysterious companion Clara in the 2012 Christmas special The Snowmen – revealed her excitement both at the anniversary and the response of fans in the US.
It was amazing to see the response over in the US. The fans are mega-fans and its really rocketed in popularity over the past few years. I’ve been walking past the news stands in New York with Matt’s face gracing the covers of magazines.
Steven [Moffat] texted me saying this will be something we will talk about in our dotage and he is right, we will.