Ready Steady Go! (or RSG!) was a British rock/pop music television programme broadcast every Friday evening from 9 August 1963 until 23 December 1966. It was conceived by Elkan Allan, head of Rediffusion TV. Allan wanted a light entertainment programme different from the low-brow style of light entertainment transmitted by ATV. The programme was produced without scenery or costumes and with a minimum of choreography and make-up. Allan recruited a fellow journalist, Francis Hitching, as producer. Hitching became a major figure in light entertainment in the 1960s. Robert Fleming was the first director, followed by the documentary director Rollo Gamble, then Michael Lindsay-Hogg, Daphne Shadwell and Peter Croft.

The programme was produced by Associated-Rediffusion, the weekday ITV contractor for London, called Rediffusion-London after 1964. The live show was eventually networked nationally. The show gained its highest ratings on 20 March 1964 when it featured the Beatles being interviewed and performing "It Won't Be Long", "You Can't Do That" and "Can't Buy Me Love" – the last being a hit at the time.

In the 1980s Dave Clark of the Dave Clark Five acquired the rights to the 1960s UK music show and bought the rights to the surviving recordings.

On 10 January 2018, BMG Rights Management announced that it had acquired the ancillary rights to Ready, Steady, Go!