Tennant took on the iconic sci-fi role from 2005 to 2010 Despite being a fan of Doctor Who since childhood, David Tennant says he briefly considered not taking on the iconic role due to some questionable advice from a former agent.

David Tennant's former agent advised him against taking the role that would make him a star, saying, "You don’t want that hung around your neck."

Although David Tennant will go down as one of the greatest "Doctors" on television, his 'Doctor Who' role only came after he sought a second opinion.