London: Twilight star Anna Kendrick reveals she had "reservations" about signing "50/50" because she was worried about facing the media briefings.

The 26-year-old star plays the role of a therapist in the comedy about a man suffering with cancer, starring Joseph Gordon-Levitt and Seth Rogen.

"I had reservations when I read the original pitch. I thought, 'I'm going to have to do press and answer questions where people ask, 'Is cancer funny? Is it really ok to laugh at that'," she said.

"It helped that it was based on the writer Will Reiser's real life story, because I feel like I can say: I guess if he finds it funny, then yes.' So far, touch wood, I haven't had a personal experience of cancer. I'm lucky I suppose," she added.