Rock Steady Crew is a breakdancing crew and hip hop group that was established in the Bronx borough of New York City in 1977. The New York Times calls the Rock Steady Crew "the foremost breakdancing group in the world today".

The original founders were Jimmy D and Jojo, two early popularizers of breakdancing.
Although breakdancing has since become a well-known subculture, in the late 1970s it was little known outside of New York, as such their early rivals were from the other boroughs of New York.

In the beginning, membership in the crew was only granted by battling with another Rock Steady member; it was a competition few people won.

In 1979 when b-boying or "breakdancing" began to die down, Jimmy D added Crazy Legs and Lenny Len to the crew. This fresh talent came at a critical time for the crew, if it had not been for these fresh new faces Rock Steady quite possibly would have ended then.