Her biggest critical and commercial success, released in 2001, became Robert Altman's all-star ensemble mystery film "Gosford Park". A homage to writer Agatha Christie's whodunit style, the story follows a party of wealthy Britons and an American, and their servants, who gather for a shooting weekend at an English country house, resulting in an unexpected murder. It received multiple awards and nominations, including a second Academy Award nomination and first Screen Actors Guild Award win for Mirren's portrayal of the sternly devoted head servant Mrs. Wilson. Mirren's last film that year was Fred Schepisi's dramedy film "Last Orders" opposite Michael Caine and Bob Hoskins.