[2] 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.
In 2004, Grosso directed his monologue Killing Paul McCartney at the Assembly Rooms at the Edinburgh Fringe Festival.
[12][13][14] The same year, Grosso was invited to participate in the inaugural 24 Hour Plays at the Old Vic Theatre, London, hosted by artistic director Kevin Spacey.
[15] In 2005, Grosso wrote A Play in Swedish English And Italian for the Royal Dramatic Theatre in Stockholm, produced by Elverket.
[16] Grosso's plays have received further productions in theatres such as the Salisbury Playhouse, other European countries,[17] and American cities including New York, Chicago, and Los Angeles.