"Que Sera, Sera (Whatever Will Be, Will Be)" is a song written by the team of Jay Livingston and Ray Evans that was first published in 1956. Doris Day introduced it in the Alfred Hitchcock film "The Man Who Knew Too Much" (1956), singing it as a cue to their onscreen kidnapped son. The four verses of the song progress through the life of the narrator—from childhood, through young adulthood and falling in love, to parenthood—and each asks "What will I be?" or "What lies ahead?" The chorus repeats the answer: "What will be, will be."

The song popularized the title expression "que sera, sera" as an English-language phrase indicating "cheerful fatalism", though its use in English dates back to at least the 16th century. Contrary to popular perception, the phrase is not Spanish in origin.

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