The London mayor has given behind-the-scenes access to renowned documentary maker Michael Cockerell for a BBC Two film.
The film sees Johnson discussing his rivalry with prime minister David Cameron, reports The Sun.
Johnson says that their rivalry stems from their Eton schooldays, when he was Cameron's senior by two years.
A source close to the film's production describes it as "revealing" and "candid".
It will also include an interview with Johnson's mother Charlotte Johnson Wahl and home footage of him as a youngster.
The source added: "It's a complete profile of the most popular and interesting politician in Britain."
Michael Cockerell has previously made similar profiles of politicians including Margaret Thatcher, Tony Blair and David Cameron.
The film will air on March 25 on BBC Two.
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