Jo Swerling was an American theatre writer, lyricist and screenwriter.
Born in Berdichev, Russian Empire, Swerling was a refugee of the Czarist regime who grew up on New York City's lower East Side, where he sold newspapers to help support his family. He worked as a newspaper and magazine writer in the early 1920s, then launched a play-writing career, including Street Cinderella, an early comedy for the Marx Brothers. He also wrote their first movie, the unreleased silent comedy short film Humor Risk (1921). He scored a major success with the book and lyrics for the musical revue The New Yorkers (1927) and the play The Kibitzer (1929), the latter co-written with actor Edward G. Robinson.