What actors and actresses appeared in The Unforgettable John Le Mesurier - 2001?

There is no known film or television production with the title "The Unforgettable John Le Mesurier - 2001".

It's possible you're thinking of a different title, or the information is incorrect.

John Le Mesurier was a well-known British actor who passed away in 1983. There were many documentaries and retrospectives about him after his death, but it's unlikely a film with that title exists.