"Break a leg" is used to wish a performer — actor, musician, comedian, or public speaker — good luck before going on stage. It is said instead of "good luck," which in theatre tradition is considered to bring bad luck. The phrase is used ironically: you say something negative to mean something positive.
Theatre is full of superstitions. Saying "good luck" directly is thought to invite the opposite. The word "Macbeth" is never spoken inside a theatre — actors call it "The Scottish Play." Whistling backstage is forbidden. These traditions likely developed in an industry where live performance leaves little room for error, and where rituals provide psychological comfort.
The phrase's precise origin is unclear. One compelling theory connects it to the stage itself: in theatrical terminology, the "legs" are the vertical curtains or flat pieces of scenery on the sides of the stage. To "break a leg" meant to cross the line of these curtains — to actually go on stage and perform. Only successful acts got that opportunity, so "break a leg" became shorthand for wishing someone a successful performance.
Another theory points to Yiddish. The expression "Hals- und Beinbruch" (neck and leg break) was used as a good luck charm in German and Yiddish — the logic being that if you invite misfortune, fortune comes instead. Jewish immigrants to New York's theatre scene may have brought the expression with them, where it was translated into English.
A third, less convincing theory claims it refers to Sarah Bernhardt, who had a leg amputated and continued performing — making "breaking a leg" an act of extraordinary commitment.
The earliest confirmed written uses appear in American sources from the 1930s and 1940s. By the 1950s it was a well-established theatrical term. The Yiddish connection is plausible given New York's role as the centre of American theatre during that era.
Saying 'good luck' is considered bad luck in theatre tradition. Break a leg is said as an ironic substitute — wishing the opposite of bad luck. Only a performer who goes on stage actually 'breaks the leg line' (crosses the stage curtains), so the phrase became synonymous with a successful performance.
Yes. The phrase has spread into general use and is now used to wish anyone good luck before a challenging event — a presentation, an exam, a job interview.