KEVIN SPACEY and CHRISTIAN SLATER

The actors will join writers and directors in what will be the fourth 24-Hour Plays gala on 11 November.

The event is to raise $250,000 (GBP125,000) for the Old Vic's New Voices programme which discovers and develops new artistic talent in theatre.

Spacey, the theatre's artistic director, says: "If you've done well in the business you wanted to do well in - and I've done better than I ever hoped - then you should spend an awful lot of time and effort sending the elevator back down."

Source: WENN