Roy Alfred Clarence Boulting (21 December 1913, Bray, Berkshire – 5 November 2001, Oxford) was a notable British filmmaker recognized for his extensive collaborations with his twin brother, John Edward Boulting (1913–1985). Together, they formed the duo known as The Boulting Brothers, with Roy directing over 30 films while John primarily took on the role of producer. Throughout his life, Roy experienced five divorces and fathered seven sons, including film director Laurence Boulting and musician Crispian Mills. He was also the uncle of Jody Boulting and the great-uncle of Jordan Stephens.

Though technically the younger twin, Roy was born just half an hour after John. The Boulting twins made their acting debut in Anthony Asquith’s 1931 film Tell England while still students at Reading School in Berkshire. After spending a few years in Canada, Roy returned to England around 1933. His career began in earnest as an assistant director on the comedy short Apron Fools in 1936, after which the brothers founded Charter Film Productions and started producing short films. Their breakthrough came in 1940 with Pastor Hall, a biopic about Martin Niemöller that highlighted anti-Nazi sentiment, based on Ernst Toller’s play. During World War II, Roy created several military documentaries with the Army Film Unit, most notably Desert Victory (1941), which won him an Academy Award. The brothers co-produced and co-directed several films together, including the Golden Lion-nominated thriller Seven Days to Noon in 1950. Roy also ventured into Hollywood independently from John, beginning with the WWII naval film Sailor of the King in 1953, featuring Jeffrey Hunter, and produced for 20th Century Fox. Between 1956 and 1959, they collaborated on a series of acclaimed satirical comedies starring actors such as Richard Attenborough, Terry-Thomas, Ian Carmichael, and Peter Sellers.

In 1966, Roy directed the comedy The Family Way, featuring John Mills and his daughter, former Disney child star Hayley Mills, with whom Roy began a romantic relationship on set, despite their 33-year age difference. His subsequent film, the psychological thriller Twisted Nerve (1968), starring Hywel Bennett, Billie Whitelaw, and Frank Finlay, sparked significant controversy for its portrayal of individuals with Down syndrome, implying a propensity for violence. The film drew criticism from the National Association for Mental Health and David Ennals, then Minister for the State of Health, leading to a backlash against Roy, who added a disclaimer to the film in response to the uproar. At the time, John was only an executive producer, which meant the brunt of the criticism fell on Roy, who was also in the public eye due to his ongoing relationship with Hayley Mills, though they never married.

In 1970, Roy rebounded with the romantic comedy There’s a Girl in My Soup, co-produced by John and featuring Peter Sellers and Goldie Hawn; this marked their final notable success. However, the subsequent film, Soft Beds, Hard Battles, despite its star-studded cast, was a significant commercial failure that resulted in considerable financial losses for Roy and marked John's last project in Hollywood. Roy directed one final comedy in 1979, The Last Word, which had a limited release and performed poorly at the UK box office. Following John's death from cancer in 1985, Roy ceased film production activities.