Under Milk Wood is a 1972 British drama film directed by Andrew Sinclair and based on the 1954 radio play Under Milk Wood by the Welsh writer Dylan Thomas, commissioned by the BBC and later adapted for the stage. It featured performances by Richard Burton, Elizabeth Taylor, Siân Phillips, David Jason, Glynis Johns, Victor Spinetti, Ruth Madoc, Angharad Rees, Ann Beach, Vivien Merchant, and Peter O'Toole as the residents of the fictional Welsh fishing village of Llareggub.

Andrew Annandale Sinclair FRSL FRSA was a British novelist, historian, biographer, critic, filmmaker, and a publisher of classic and modern film scripts. He has been described as a "writer of extraordinary fluency and copiousness, whether in fiction or in American social history".