Rediscovering a set of photos Sir Paul McCartney took in the early days of The Beatles left him “instantly flooded with memories and emotions”.
Sir Paul took the images during “an intense three-month period of travel” in 1963 and 1964 but believed they had been lost.
He said unearthing them had “plunged” him “right back” into the experience.
The photos will be shown at the National Portrait Gallery as part of its relaunch and published in a book.
Paul McCartney Photographs 1963-64: Eyes of the Storm will run between 28 June and 1 October as one of two major exhibitions that will launch the London gallery’s summer programme.