From The Guardian:
Coleman, who is due to start work on the show next weekend, has had to keep the news of her new role secret. “A few members of my family knew but it’s a huge relief today to be able to phone up my flatmate and tell them,” she said.
"I’ve had a few conversations with Matt who’s been amazing. He texted me this morning wishing me good luck and ‘We’ll have the best time ever,’ I think were his words. So he’s been very supportive and very excited.”
Saying she was a fan of the show, the actor said that David Tennant and Billie Piper were probably the Doctor and companion she was most fond of – alongside Smith and Gillan, of course.
Coleman won her part on the show after impressing with her chemistry with Smith.
Coleman, who is 25 and from Blackpool, said that she hopes she is prepared for the huge interest that surrounds the show and the pressures that brings but is trying to focus on the job. “What I feel really comfortable with is the meetings that I’ve had with Matt and how much fun we had,” she said.
"That is what I’m focusing on and why I can’t wait to get on set, and read all the scripts and just start doing my job really," she said. "So I think I’m trying not to really look at those pressures and just be excited about the job in itself."
The actor found she’d got the job while she was in Marks & Spencer buying the ingredients for a salad. "I was in Marks & Spencers holding an avocado," she laughed. “I put my basket down and left Marks & Spencers. But I couldn’t tell anyone so I went for a bit of a walk and tried to digest. It was really quite surreal.”