Ian Colin Marmaduke de Collieur Wetherell (1912–1987), most often credited simply as Ian Colin, was a British film and television actor. During the 1930s, Colin was a leading man in quota quickies. He later acted predominantly in television shows such as The Quatermass Experiment, Emergency-Ward 10 and Coronation Street.
Colin was the son of M. A. Wetherell and Lena McNaughton. In his youth, he was involved, with his father, also an actor, screenwriter, director, producer, and big-game hunter, in creating the hoax "surgeon's photograph" of the Loch Ness Monster—he bought the materials and took the picture.