Harold Lloyd Nicholas was an American dancer specializing in tap. Nicholas was the younger half of the tap-dancing pair the Nicholas Brothers, known as two of the world's greatest dancers. His older brother was Fayard Nicholas. Nicholas was featured in such musicals as An All-Colored Vaudeville Show (1935), Stormy Weather (1943), The Pirate (1948), and The Five Heartbeats (1991).

The Nicholas Brothers were an entertainment act composed of brothers, Fayard (1914–2006) and Harold (1921–2000), who excelled in a variety of dance techniques, primarily between the 1930s and 1950s. Best known for their unique interpretation of a highly acrobatic technique known as "flash dancing", they were also considered by many to be the greatest tap dancers of their day, if not all time. Their virtuoso performance in the musical number "Jumpin' Jive" featured in the 1943 movie Stormy Weather has been praised as one of the greatest dance routines ever captured on film.