Before founding the Half Moon Theatre in London, England, Sprung was an assistant director at the Schiller Theater in Berlin.
As director of Balconville by David Fennario, Sprung traveled with the company on an international tour to England and Ireland.
Guy Sprung co-founded Half Moon Theatre in 1972 with Maurice Colbourne and Michael Irving and was the first Artistic Director.
Other productions he directed included Will Wat, If Not, What Will?, Fall In and Follow Me, Get Off My Back, Ripper!, The 3p Off Opera and Paddy.
His published works include Hot Ice, a diary of directing Shakespeare in Russian at the Pushkin Theatre, and the plays Death And Taxes and Fight On!.