The play, which is to be directed by the playwright, is described in press materials as "a dark comedy of sibling rivalry" that "escalates into a psychological thriller, bursting with savage conflict." On a dark and stormy night, all Bobby thought he was doing was helping his sister Betty clear out her cottage in the forest. But in this cabin of lies nothing is as it seems and the truth refuses to be packed away. What is she hiding? Does he really want to find out?

LaBute is currently represented Off-Broadway by The Break of Noon, playing at the Lucille Lortel. His previous plays to be seen in London include bash: Latter-Day Plays, The Shape of Things, The Distance from Here, The Mercy Seat and In a Dark Dark House (all at the Almeida), This is How It Goes (Donmar Warehouse) and Fat Pig and Some Girl(s) (both West End).

Fox, who plays Bobby, jointly won the 2005 SAG Ensemble Award, and was also nominated for the Golden Globe and Emmy for Outstanding Leading Man in a Drama Series for his work on "Lost." His other television work includes the Golden Globe award-winning series "Party of Five." For film, his credits include "Speed Racer," "Vantage Point," "Smokin’ Aces" and "We are Marshall."

Williams has previously appeared on the London stage in Happy Now? and Love's Labour's Lost (both National Theatre), The Changeling (Barbican Theatre), Hotel in Amsterdam (Donmar Warehouse) and Richard III, Peer Gynt, The Wives' Excuse and Wallenstein (RSC). Her extensive film credits include Polanski's "The Ghost Writer," "Sex & Drugs & Rock & Roll," "An Education," "To Kill a King," "The Heart of Me" (Best Actress Award at the British Independent Film Awards), "The Sixth Sense," "The Postman" and the forthcoming "Hanna and Longfellow."

The play is produced by Anna Waterhouse, Nica Burns, Max Weitzenhoffer, Jay Harris and Josephine Genetay. Designs are by Soutra Gilmour, lighting by Mark Henderson and sound by Fergus O’Hare. To book tickets, visit www.lastminute.com now (exclusively through Nov. 26); thereafter, contact the box office on 0844 412 4663, or visit ww.nimaxtheatres.com.