"My brother sent me a text saying, 'Congratulations, they've released odds on you being the new Doctor Who' - which we thought was very funny. It's all on Twitter, isn't it? I don't have Twitter. No-one's ever asked me about it. I assume they would have to ask me for it to be true." British actress Olivia Colman dismisses rumours she is in line to play the next Doctor Who after Matt Smith steps down as the TV Time Lord.