The designs were created for use across all marketing materials for the exhibition including invites, posters, tube posters, banners, bus backs and sides, and postcards.
Rufus Leonard's association with the NPG dates back to 2004 when it refreshed its brand and visual identity, overhauling the restaurant areas and the design of all printed materials. It is currently working on the gallery's 150th anniversary gala celebrations.
'Annie Leibovitz: A Photographer's Life' includes more than 175 images from Leibovitz's editorial work and personal collection.
Images ranging from Hillary Clinton's election to the US Senate to the aftermath of the September 11 bombings feature alongside photos of Leibovitz's family and close friends, documenting the photographer's personal history.
The exhibition has toured the world, visiting New York, San Diego, Atlanta, Washington, San Francisco and Paris. The gallery is hosting it's only UK appearance.
Andrew Pinkess, strategy director for Rufus Leonard, said: "We have designed something that is intimate and lasting that encompasses celebrity and family images from the photographer's amazing and quite unusual life."