That Hamilton Woman.
The School of Scandal if you recall, was a play written by Georgiana's friend Richard Brinsley Sheridan. Sheridan based his character off his own friends and the main character of the play, Lady Teazle was inspired by Georgiana. So in a way, the legendary Leigh played the legendary duchess!
For more info on Leigh and Olivier's performances in The School for Scandal check out this lovely site.