The former Life On Mars actor has been regularly linked to the lead role, despite his previous appearances in the show as the Time Lord's arch nemesis The Master.
Speaking to The Times, Simm clarified his stance and also hinted at a return to the programme, saying: "I'm The Master. Simple as that. I don't want to be Doctor Who. I might be the Master again... I'm not allowed to say."
Previously, Simm told the Daily Record: "I'm not... ruling out a return to Doctor Who in the future. It's too exciting a show to be a part of for me to do that."