Robert Walker, American actor (d. 1951)
Robert Hudson Walker (October 13, 1918 – August 28, 1951) was an American actor, best remembered for his starring role as the villain in Alfred Hitchcock's thriller Strangers on a Train (1951), which was released shortly before his death.

He started in youthful boy-next-door roles, often as a World War II soldier. One of these roles was opposite his first wife, Jennifer Jones, in the World War II epic Since You Went Away (1944). He also played Jerome Kern in Till the Clouds Roll By. Twice divorced by 30, he suffered from alcoholism and mental illness, which were exacerbated by his painful separation and divorce from Jones.