From Wikipedia, the free encyclopedia. Keith Skinner (born 1949) is a British actor who worked in cinema and television. His career began when he starred as Bruno in the 1966 film Mademoiselle, and more notably perhaps in Franco Zeffirelli's 1968 film Romeo and Juliet as Balthasar, Romeo's manservant and trusted friend. He appears at various stages in the film including galloping on horseback to tell Romeo (played by Leonard Whiting)... see more