Peter Michael "Mike" McCartney (born 7 January 1944), known professionally as Mike McGear, is a British performing artist and rock photographer and the younger brother of Paul McCartney. He attended the Liverpool Institute two years behind his brother.

At the time the Beatles became successful, Mike McCartney was working as an apprentice hairdresser. However, he was also a member of the Liverpool comedy-poetry-music group the Scaffold, which included Roger McGough and John Gorman and had formed in 1962 (the year of the Beatles' first hit). McCartney decided to use a stage name, so as not to appear to be riding his brother's coattails. After first dubbing himself "Mike Blank", he settled on "Mike McGear", "gear" being the Liverpudlian equivalent of "fab". The band was subsequently signed to Parlophone.

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