Her play, "Life X 3", was performed at the Royal National Theatre, Lyttelton Stage, UK, and was nominated for a BBC Award for Best New Play in 2001 (2000 season) at the Laurence Olivier Theatre Awards.
Her play, "The Unexpected Man", was nominated for the BBC Award for Best New Play at the 1999 Laurence Olivier Theatre Awards for the 1998 season.
Her play, "Art", was performed at the Wyndham's Theatre in the UK and was awarded the 1997 Laurence Olivier Theatre Award for Best New Comedy of 1996.
Her play "Art" was awarded the 1996 London Evening Standard Theatre Award for Best Comedy.
She was nominated for a 2001 London Evening Standard Theatre Award for Best Comedy for Life x 3 performed at the National Theatr and later transferred to Old Vic Theatre.
Won Broadway's 1998 Tony Award as author of Best Play winner "Art."
Member of jury at the Cannes Film Festival in 1999
Her screenplay for Carnage (2011) is an adaptation of her Broadway script for the drama, "God of Carnage", in New York City, which was awarded the 2009 Tony Award for Best Original Play.
Her play, "God of Carnage" at the Ahmanson Theatre in Los Angeles, California was awarded the 2012 Back Stage Garland Award for Production.