William Roache
Updated: Wikipedia source
William Patrick Roache (born 25 April 1932) is an English actor. He is best known for playing Ken Barlow in the ITV soap opera Coronation Street and is the longest-serving cast member in the series, having appeared in the show continuously since its first broadcast on 9 December 1960. He is listed in the Guinness World Records as the longest-serving television star in a continuous role.