On the Basis of Sex is a biographical legal drama film directed by Mimi Leder. It tells the story of Ruth Bader Ginsburg, a pioneering lawyer and Supreme Court Justice. Armie Hammer portrays Martin D. Ginsburg, Ruth's husband and a supportive partner in her fight for gender equality. The film explores Ruth's early career and her landmark case that challenged gender discrimination. Hammer's performance showcases the loving and supportive relationship between Martin and Ruth.