Why were the Nicholas Brothers considered a triple threat in show business?

The Nicholas Brothers were considered a "triple threat" in show business because of their remarkable versatility as performers. They possessed the ability to sing, act, and dance, which allowed them to headline productions across a wide variety of mediums, including vaudeville, motion pictures, nightclubs, concerts, Broadway, records, radio, and television.1

While they were most renowned for their pioneering style of classical tap—which integrated jazz dance, ballet, and acrobatics—their capacity to excel in these three core performance disciplines defined their status as a triple threat. As Fayard Nicholas famously noted regarding their extensive range, "We did everything in show business except opera".1