Girl Stroke Boy is a 1971 British comedy-drama film directed by Bob Kellett and starring Joan Greenwood, Michael Hordern, Clive Francis, and Peter Straker, based on the play Girlfriend by David Percival.^[3][2]

A middle-aged couple, author Letty and school teacher George, worry if their son Laurie will ever get married. Laurie brings home his new girlfriend Jo, the androgynous child of a West Indian politician, whose gender and sex Letty begins to question.

• Joan Greenwood – Lettice Mason
• Michael Hordern – George Mason
• Clive Francis – Laurie
• Peter Straker – Jo Delaney
• Patricia Routledge – Pamela Hovendon
• Peter Bull – Peter Hovendon
• Rudolph Walker – Mr Delaney
• Diana Hoddinott – Wife / Husband
• Elisabeth Welch – Mrs Delaney

The film was based on the play Girlfriend. The cast included Margaret Leighton, John Standing (Lorn), Alan MacNaughton (George), and Michel Des Barres and was directed by Vivian Matalon. It was by first time author, school teacher David Percival.^[4] It opened on 17 February 1970.^[5] The Daily Telegraph called it "an equivocal comedy balanced halfway between a wink and a snigger."^[6] The Observer said "it dragged the you-can't-tell-them-apart-in-those-clothes joke over a lamentable evening in which you were asked to believe no one on stage could notice the fiance of title's Adam's apple. The most maddening thing about it was the waste" of the cast and the author's talent whose "lines were fine. They only needed a play."^[7]

The play had flopped but Ned Sherrin bought the film rights. The movie version was shot over two weeks at a cost of £50,000 (the low cost because fees were deferred). The film was sold to John Daly of Hemdale.^[2]

It was the film debut of Peter Straker, who had been in Hair. He called the script "hysterical but it didn't turn out as well as it could have. But it was the chance of a lifetime."^[8]

Producer Ned Sherrin said the film previewed well but received poor reviews and minimal box office. However he says the film's costs were recovered through a television sale.^[2] Peter Straker said the film had a long run in cinemas and was released on a double bill with School for Virgins.^[8]

Variety called it "a light, would-be sophisticated comedy" where "Young and old alike could find its single uni-sex joke tedious and sometimes unpleasant... The film, despite added exteriors, is stagy in the extreme."^[1] The Evening Standard said "it might have been called "Guess What's Coming to Dinner?"... a more tedious, ill-made, appallingly-acted and directed piece of mindlessness it would be difficult to discover in a decade of filmgoing."^[9]

Peter Straker claimed "the reviewers were just trying to make it into a vast racial transvestite mountain. It would have been alright if they had just stuck to the movie's failings as a comedy. And there were many, which I think was the fault of the director."^[8]