What is the traditonal way to wish an actor good luck?

The traditional way to wish an actor good luck is to say "Break a leg!" The origins of this phrase are uncertain, but it is thought to have originated in the 17th century. It is believed that the phrase began as a way to wish actors good luck after a performance, as the breaking of a leg was seen as a sign that the performance had gone well. Over time, the phrase came to be used more generally to wish actors good luck before a performance.