Break a leg! is an informal way to say good luck, especially to someone who is about to perform. It is never meant literally: nobody wants you to get hurt.
The weird part
Imagine you're about to walk on stage, and your friend whispers:
"Break a leg!"
Taken literally, that's a terrible thing to wish someone. But in English it means the exact opposite: I hope you do brilliantly.
So English has two ways to wish a performer luck:
- "Good luck!": says exactly what it means.
- "Break a leg!": says something awful and means something lovely.
Why would anyone choose the second one? Hold that thought. We'll get to it below.
When do people say it?
Break a leg sounds most natural just before someone performs or is judged in front of others:
- a play, concert, dance show or stand-up gig
- an audition
- a big talk, pitch or presentation (a newer, more playful use)
It's friendly and informal. For most other situations, such as an exam, a job interview or a driving test, a simple "Good luck!" is the safer, more natural choice. Break a leg works there too, but mostly between friends who enjoy the joke.
And if someone is about to do something physically risky, like skiing or climbing, skip it. There, it just sounds like a bad joke.
Examples
You've rehearsed that monologue a hundred times. Break a leg tonight!
"My audition is at ten." "Break a leg! Text me when you're done."
Break a leg with the product demo tomorrow. The whole team is behind you.
In a conversation
Nina: I'm so nervous. We're on in five minutes.
Jake: You'll be amazing. Break a leg!
Nina: Thanks! If I forget my lines, just pretend it's modern art.
Jake: Deal. Now go!
A simple "Thanks!" is the normal reply. You don't need to wish anything back.
But why would breaking a leg mean good luck?
Here is what we actually know, from most certain to least.
- The superstition is real. Performers have long believed that wishing someone good luck directly brings bad luck. So you say something bad instead, as a kind of reverse wish.
- The earliest known example is from 1921, and it isn't about theatre. A writer describing superstitions explained that before a horse race you shouldn't say "Good luck!", but something like "May you break your leg!"
- Theatre people picked it up later. The first clear printed example of actors saying it comes from 1948, although people claim it was used backstage earlier.
- German has a very similar wish, Hals- und Beinbruch ("break your neck and leg"), and it is older. It may have travelled into English, but the evidence for that link is thin.
What nobody can say for certain is exactly how or where the English wording began.
Origin stories you may have heard
The internet loves a good origin story. Unfortunately, these have no historical evidence behind them:
- Bowing: actors "breaking" the line of the leg when bowing to applause.
- Curtains: theatres call the side curtains legs, so a big success meant stepping past them onto the stage.
- A famous accident: the actor John Wilkes Booth broke his leg in 1865, decades before anyone is known to have said the phrase.
- Hebrew or Yiddish: a blessing that supposedly sounded like the German phrase. It's a popular theory, but unproven.
They're fun to hear, but they're guesses, not history. Sometimes English is weird, and sometimes nobody knows exactly why.
English isn't alone, either. Italians wish each other luck with in bocca al lupo, "into the wolf's mouth".
Common mistakes
Keep the words fixed. It's always a leg.
❌ Break the leg!
✅ Break a leg!
Only for performing, not for risky activities.
❌ Going skiing tomorrow? Break a leg!
✅ Going skiing tomorrow? Have fun, and be careful!
Similar expressions
- Good luck!: works everywhere, from exams to interviews to emails to your manager.
- Fingers crossed!: you're hoping things go well. You can say it about yourself too: Fingers crossed I get the job.
- You've got this!: encouragement, not luck. It says you believe in the person.
- Knock 'em dead!: impress them. Another performance wish that sounds far more violent than it is.
Break a leg isn't the only idiom where breaking something is a good thing. You can also break the ice, which means getting people to relax and start talking.
Easy way to remember it
Think of it as "opposite day at the theatre." Backstage, good luck is the unlucky thing to say, so you say the opposite.
Picture a performer covering a friend's mouth just before they say "Good luck!", and whispering, "Shh! Say break a leg!"
Quick check
- Your friend is about to perform in a school concert. Which sounds most natural: Break a leg! or Be careful not to fall!?
- Does Break a leg! mean the speaker wants you to get hurt?
- Which is correct: Break the leg! or Break a leg!?
- Your colleague is going mountain biking this weekend. Is Break a leg! a good choice?
- True or false: we know for certain that the phrase began because of stage curtains called "legs".
Answers
- Break a leg! It's the classic wish before a performance.
- No. It means good luck, the exact opposite of its literal meaning.
- Break a leg! The wording is fixed.
- No. With a risky physical activity, it just sounds like a bad joke. Try Have fun, and be careful!
- False. That story is popular, but there's no evidence for it. The exact origin is unknown.