Martin, a manservant - Richard Frame
Charles Courtly - Paul Ready
Richard Dazzle - Matt Cross
Sir Harcourt Courtly, Bart - SImon Russell Beale
Squire Max Harkaway - Mark Addy
Pert - Maggie Service
James - Simon Markey
Grace Harkaway - Michelle Terry
Mark Meddle - Tony Jayawardena
Lady Gay Spanker - Fiona Shaw
Mr Adolphus Spanker - Richard Briers
Mr Solomon Isaacs - Junix Inocian
Servants - Mark Extance, Prasanna Puwanarajah
Doctor's Daughters - Fiona Drummond, Laura Matthews
Directed by Nicholas Hytner and designed by Mark Thomspon.
Seen on it's first night of preview, I believe in the the glorious chapel of mirth that is called the Olivier Theatre. Mark Lawson was apparently in the audience though I didn't see him.

If you can't get to London, catch it in a cinema somewhere on 28th June 2010 where it will be broadcast live.