The Man Who Knew Too Much is a 1956 American suspense thriller film noir directed by Alfred Hitchcock, starring James Stewart and Doris Day. The film is Hitchcock's remake of his own 1934 film of the same name.
In the book-length interview Hitchcock/Truffaut (1967), in response to fellow filmmaker François Truffaut's assertion that aspects of the remake were by far superior, Hitchcock replied "Let's say the first version is the work of a talented amateur and the second was made by a professional."
The film won an Academy Award for Best Song for "Que Sera, Sera (Whatever Will Be, Will Be)", sung by Doris Day. It premiered at the 1956 Cannes Film Festival, on April 29.