Maria Elizabeth Riva (née Sieber, born 13 December 1924) is a German-born American actress, writer and activist. She worked on television in the 1950s. She is the daughter of actress Marlene Dietrich. Riva was born in Berlin, Weimar Republic. Her career began in 1934.
During the 1950s, Riva appeared in more than 500 live teleplays for CBS, all broadcast from New York, including The Milton Berle Show, Lux Video Theatre, Hallmark Hall of Fame, Your Show of Shows and Studio One. She received Emmy nominations as best actress in both 1952 and 1953.
Riva was married to Dean Goodman from 1943 until they divorced a year later. She later married William Riva in 1947 and would remain married until his death in 1999. They had four children; including J. Michael and Peter Riva.