Lumley, who was last on stage in The Lion in Winter in 2011, and Scott, whose recent credits include The Emperor and Galilean (National), Cock (Royal Court) and Sherlock (BBC), will appear in Family Voices and Victoria Station.
The productions will be staged on the set of The Hothouse from 27 to 29 June, directed by Trafalgar Transformed associate director Edward Stambollouian.
Other events include a Pinter masterclass with Jamie Lloyd (17 June) and panel discussions featuring Lloyd alongside Pinter’s widow Lady Antonia Fraser and his biographer Michael Billington.
There will also be post-show Q&A’s with the cast, which is led by Simon Russell Beale and John Simm.
First performed at the Hampstead Theatre in 1980, The Hothouse
is set on Christmas Day in a nameless state-run mental institution where
the inmates are subjected to a tirade of mindless cruelty. A maniacal
and self-obsessed leader breeds a contagion of hierarchical savagery
amongst his staff, who thrive on a noxious diet of delusion and deceit.
It runs at Trafalgar Studios – which has been reconfigured in-the-round for Lloyd’s season – from tonight (9 May, previews from 4 May) until 3 August.