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.

On television, Douglas was in the children's programme Waiting for Elvis which was part of Dramarama (TV series) written by Alex Norton.

The episode featured Fergie (played by Sannachan), a young singer, trying to impress Elvis Presley during his short stop at Prestwick Airport in 1960 on his only confirmed visit to the UK.

He has made over thirty appearances at the Pavilion Theatre, Glasgow, including Peter Pan, Cinderella, The Wizard of Never Woz [7] Please Stay, The Bigot [8] and Paras Over the Baras.

The film is based on the worldwide hobby of Geocaching, but rather than people finding caches hidden in the woods, they are more likely to be killed in unusual and gruesome ways.