Lisa started a blog detailing her battle with cancer after she was diagnosed in 2008. The blog was very popular; it was made into a book called "C Word".
After a year of intensive treatment, Lisa was told that her mammogram was clear and she prepared to get on with her life, cancer-free. In 2011, the cancer returned and it was terminal. In October 2012, Lisa was told the cancer had spread to her brain and she had months to live. Lisa died just five months later.
Sheridan who shaved for the role said, "It did upset me a little bit at the time, but its just hair - it'll grow back. And 'The C Word' is about such an amazing woman. Everyone is affected by cancer and I lost my eldest brother to it, so although of course you feel like you've lost a bit of your femininity, I feel it's the least I could do. And actually, shaving my head has been liberating. I know I'll never do it again, so I can enjoy all the different styles it'll go through before I'm back to being me."