Sacha Guitry (21 February 1885 – 24 July 1957) was a French film actor, director, screenwriter, and playwright. He was born in Saint Petersburg, Russia, in 1885, the son of the actor Lucien Guitry. Guitry wrote the libretto to the 1925 pastiche Mozart which contains a story about the fictional adventures of Mozart on a visit to Paris.
Except when mentioned, Guitry took part in all of his films as director, screenplay writer, dialogue writer, and actor. —Wikipedia