Diana (1973)

After a divorce, beautiful Brit Diana Smythe decides to begin a new life by moving from London to New York City and starting a new career as a fashion coordinator at a Fifth Avenue department store. Living in her brother's empty apartment (to which many young ladies still have keys), Diana learns a new American way of life, assisted by friendly neighbor Holly Green, copywriter Howard Tollbrook, window decorator Marshall Tyler and new pal Jeff Harmon.