Despite having to wear a corset and lots of layers during the blazing summer heat, that didn't restrict Billy from having fun.
"I wore layer after layer and yet I found the corsets really helped me get into character. It's actually really hard to become a Victorian woman without donning one, because the minute you put it on, you hold yourself differently - your hair is up and you are wearing period jewellery.
"In the beginning, you find you eat very little because it sits on your chest. After a while, I got so used to it that I was able to wolf down a shepherd's pie for lunch without blinking.
Billie now feels like she has finally found her forte in life and is constantly pushing the perimeters of her comfort zone to embrace new challenges.
"I'm fulfilling all the big dreams I had as a kid. The thought of not being involved in the acting world makes me really sad. I hope to be growing and adapting and learning different things. I'm so ready to have a good crack at the whip now with the Sally Lockhart Mysteries and my first lead role."
Despite being offered a number of film roles she hasn't quite found the right one for her.
"If the right movie came along I would love to do it, but I'm enjoying my television work at the moment. I've seen a few big action scripts for film. I'd love to do something a bit more domestic like current affairs or a political thriller - anything with a social conscience. We shall see what comes along."
