Robert Frederick Day (September 11, 1922 – March 17, 2017) was an English film director. He directed more than 40 films between 1956 and 1991. Day was born in Sheen, England.
Day worked his way up from clapper boy to camera operator, then cinematographer, in his native England, and began directing in the mid-1950s. His first film as director, the black comedy The Green Man (1956) for the writer-producer team of Frank Launder and Sidney Gilliat, gained good reviews. Using this as a starting point, Day went on to become one of the industry's busiest directors. He relocated to Hollywood in the 1960s and directed many TV episodes and made-for-TV movies. He occasionally had small parts in his own productions, including The Haunted Strangler (1958), Two Way Stretch (1960), and the TV mini-series Peter and Paul (1981).
In the 1970s and 1980s, Day would direct episodes of numerous American television shows, including Barnaby Jones, The F.B.I., Dallas, Walt Disney's Wonderful World of Color, and Matlock.
Day was married to Eileen Day and then, following their divorce, to actress Dorothy Provine until her death.