"Wild One" or "Real Wild Child" is an Australian rock and roll song written by Johnny Greenan, Johnny O'Keefe, and Dave Owens. While most sources state that O'Keefe was directly involved in composing the song, this has been questioned by others.Sydney disc jockey Tony Withers was credited with helping to get radio airplay for the song but writer credits on subsequent versions often omit Withers, who later worked in the United Kingdom on pirate stations Radio Atlanta and, as Tony Windsor, on Radio London.

According to O'Keefe's guitarist, Lou Casch, the song was inspired by an incident at a gig in Newtown, Sydney, in about 1957. According to Casch, as O'Keefe and the Dee Jays played at an upstairs venue, an "Italian wedding" reception was taking place downstairs. Some of the dance patrons came to blows with wedding guests in the men's toilets, and within minutes the brawl had become a full-scale riot that spilled out into the street, with police eventually calling in the Navy Shore Patrol to help restore order.

The release date of the single, 5 July 1958, is considered the birth of Australian rock and roll. The band Jet and Iggy Pop cover was released to mark the 50th anniversary of the original release. The Living End performed the song at the 2008 APRA Awards to mark the anniversary.

O'Keefe was the first artist to record it, on his debut EP Shakin' at the Stadium, released on the Festival label. This version, ostensibly recorded live at the Sydney Stadium, was in fact a studio recording, overdubbed with the sound of a real audience.

An alternate version was recorded and released outside Australia: in the USA (as "Real Wild Child") on Brunswick and in the UK on Coral. "Festival liner notes have always put forward that the crowd overdub was the only difference... Ignoring the crowd overdub at the start, both versions have a different intro and JOK's vocal on the foreign versions is noticeably wilder than on the EP version issued here… As far as I know, the US/UK single version which, IMHO, is markedly superior to our version, was never issued in Australia... at the time, [but] it did finally appear on a local compilation LP in the 70's and is now commonly available on various JOK CDs."
Tony Watson

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