Jenna-louise Coleman has told reporters that luck was on her side when she landed the role of Doctor Who's new sidekick. It would seem that a little brainpower and literal thinking helped though. When she went for the job, it was codenamed as 'Men On Waves' but a little bit of detective work on Jenna's part unlocked the mystery.
In an interview with Radio Times, Jenna says "I worked out that Men On Waves is an anagram of Woman Seven, because this is the seventh series. Weirdly, seven is my lucky number and this is my seventh job." When she found out that she'd landed the coveted role (whilst she was shopping at Marks and Spencer), she had to keep the news a secret from family and friends and even from her own agent. "I wasn't allowed to say that it was Doctor Who at any point," Coleman explained. "Not talking to my agent, not when I arrived at the audition, and I certainly couldn't tell anyone at all what I was up to next."
Jenna will have a lot more secrets to keep in the coming months as filming for the new series begins, as she won't be able to let any of the forthcoming storylines slip. Trying to keep the stress of secrecy to a minimum, she says "I just told Steven [Moffat] and [producer] Caroline Skinner 'Don't tell me anything until I need to know it'." As it stands, she has an idea of the story and some the surprises but other than that, she'll be keeping herself in the dark.