The Understudy is a scintillating comedy of ambition, celebrity, jealousy and love from the author of the smash hit One Day.

For Josh Harper, being in show business means money, fame, a beautiful wife and a lead role on the London stage. For Stephen C McQueen it means a disastrous career playing passers-by and dead people. Stephen's stuck with an unfortunate name, a hopeless agent, a daughter he barely knows and a job as an understudy to Josh Harper, officially the 12th sexiest man in the world. And when Stephen falls in love with Josh's clever, funny wife Nora, things get even more difficult. But might there yet be a way for Stephen to get his big break….