"Look Back in Anger" is the most noted work of which playwright?

Look Back in Anger (1956) is a realist play written by John Osborne. It focuses on the life and marital struggles of an intelligent and educated but disaffected young man of working-class origin, Jimmy Porter, and his equally competent yet impassive upper-middle-class wife Alison. The supporting characters include Cliff Lewis, an amiable Welsh lodger who attempts to keep the peace; and Helena Charles, Alison's snobbish friend.

Osborne drew inspiration from his personal life and failing marriage with Pamela Lane while writing Look Back in Anger, which was his first successful outing as a playwright. The play spawned the term "angry young men" to describe Osborne and those of his generation who employed the harshness of realism in the theatre in contrast to the more escapist theatre that characterised the previous generation. This harsh realism has led to Look Back in Anger being considered one of the first examples of kitchen sink drama in theatre.