Final answer:
Miguel de Cervantes was a successful playwright before becoming a writer.
Step-by-step explanation:
Miguel de Cervantes, the author of Don Quixote, was actually a successful playwright before he became a writer. He penned thirty comedias, but only two of his plays survive; The Traffic of Algiers and The Siege of Numantia. Cervantes was one of Spain's early successful playwrights and his works were popular during the Golden Age of Spanish theatre.