Douglas Sannachan_

Douglas Sannachan (born 1962 in Glasgow) is a Scottish actor and film maker most widely known for playing Billy the window cleaner in Gregory's Girl. His famous line was "If I don't see you through the week, I'll see you through a window". He grew up in the Calton area of Glasgow and was a pupil at John Street Secondary School, Glasgow. When he was 16 years old he was the subject of a chapter of a book called The Year of the Child by Bel Mooney. Sannachan was a member of the Glasgow Youth Theatre and is a friend of John Gordon Sinclair and Robert Buchanan.