Robert Hudson Walker (October 13, 1918 – August 28, 1951) was an American actor. He is probably best known for his role as Bruno Anthony in Alfred Hitchcock's 1951 thriller Strangers on a Train.
Born in Salt Lake City, Utah, to Zella (née McQuarrie) and Horace Walker, he was the youngest of four sons. Emotionally scarred by his parents' divorce when he was still a child, he subsequently developed an interest in acting which led his maternal aunt Hortense (McQuarrie) Odlum (the president of Bonwit Teller) to offer to pay for his enrollment at the American Academy of Dramatic Arts in New York City in 1937. Walker lived in her home during his first year in the city.
While attending AADA, Walker met fellow aspiring actress Phylis Isley, who later took the stage name Jennifer Jones. After a brief courtship, the couple were married in Tulsa, Oklahoma on January 2, 1939 and moved to Hollywood to find work in films but their prospects proved to be meager and they soon returned to New York.