Complex sentence: He became a protege of Noël Coward and began appearing in London in plays such as "Dracula" and "Another Language"; he started being cast in some British films of the early 1930s.
Split into simpler sentences: He became a protege of Noël Coward and began appearing in London in plays such as "Dracula" and "Another Language". He started being cast in some British films of the early 1930s.