Jean Acker (born Harriet Ackers; October 23, 1893 – August 16, 1978) was an American actress with a career dating from the silent film era through the 1950s. She was perhaps best known as the estranged wife of silent film star Rudolph Valentino.
After divorcing Valentino in 1923, Acker was engaged to Marquis Luis de Bezan y Sandoval of Spain. Then, she was in the news over her relationship with Rahmin Bey. In 1930, after she lost her fortune in the 1929 stock market crash, she sued William Delahanty, claiming that he agreed to pay her $18,400 per year if she gave up her film career. The married politician denied that he made such a promise but admitted that he spent thousands of dollars on Acker. Acker met Chloe Carter (June 21, 1903 - October 28, 1993), a former Ziegfeld Follies girl, who was the first wife of film composer Harry Ruby. Acker remained with Carter for the rest of her life. The couple owned an apartment building together in Beverly Hills.