J.K. Rowling is a British author best known for writing the immensely popular Harry Potter book series. Born as Joanne Rowling, she adopted the pen name J.K. Rowling to appeal to a wider audience. Her books have been translated into multiple languages and have sold millions of copies worldwide. In addition to her Harry Potter series, Rowling has also written novels for adults and children, as well as screenplays and stage plays. She is a philanthropist and is involved in various charitable causes.