The band's first feature film, which is directed by Morgan Spurlock, follows Niall, Louis, Harry, Zayn and Liam as they go on tour.
The film will be released on August 29.
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The plans had been in development since 2014, but would help underline Britain as a "global player" following the Brexit result.
The number of calls about children suffering or witnessing emotional abuse or physical violence in the home has surged in recent years.
The curtain will come down on the show for the final time at the Piccadilly Theatre in March next year, before embarking on a UK tour.