Nick Grosso is a British playwright, born in London in 1968 to Argentine parents of Italian and Russian extraction. His style has been described as that of a "latter-day Oscar Wilde on speed" by Sheridan Morley.

In 1993, Grosso's monologue Mama Don't was produced by the Royal Court Young People's Theatre and put on at the Commonwealth Institute, London. It was directed by Roxanna Silbert.

A year later, his first stage play, Peaches, was produced by the Royal Court Theatre in association with the Royal National Theatre Studio and put on at the Royal Court Theatre, London. It starred Ben Chaplin. According to Michael Billington, the season in which Peaches appeared (which also included Blasted by Sarah Kane) defined the historical importance of the Theatre Upstairs, a season of new writing masterminded by Stephen Daldry.

In 1996, Grosso's second stage play, Sweetheart, was produced by the Royal Court Theatre and put on at the Royal Court Theatre, London, before embarking on a regional tour. It starred Kate Beckinsale.

In 1998, Grosso's third stage play, Real Classy Affair, was produced by the Royal Court Theatre and put on at the Ambassadors Theatre, London. It starred Joseph Fiennes and Nick Moran.

In 2000, Matthew Rhys played the lead role in Peaches, the film of the play written, it was also directed by Grosso.

His fourth stage play, Kosher Harry, was produced by the Royal Court Theatre and put on at the Royal Court Theatre, London, in 2002. It was directed by Kathy Burke and starred Martin Freeman.

Since then, the Hampstead Theatre in London has produced and put on three young people's plays by Grosso.