Sorry, you must have the wrong number
cost of xalatan Smith debuted in the role at the age of 27, making him the youngest actor to play the part. The Fifth Doctor, Peter Davison, was previously the youngest, beginning the role at the age of 29. William Hartnell has always held the title of the oldest Doctor, taking on the role at the age of 55; new Doctor Peter Capaldi will also be 55 when he takes over from Matt Smith.