Since Sweeney Todd: The Demon Barber of Fleet Street in 2007, Leah Gallo has worked as a photographer on Tim Burton's films as well as an author and book editor. She provided photographs to The Art of Miss Peregrine's Home for Peculiar Children and Big Eyes: The Film, the Art, as well as writing and editing them. She also co-edited the companion volume, The Napkin Art of Tim Burton, and wrote and edited the award-winning tome The Art of Tim Burton. For Dark Shadows, Frankenweenie, and Alice in Wonderland, she donated images and produced visual accompaniment. Gallo also created specific crew books for four of Tim Burton's films under his supervision.

She assists on projects at Tim Burton Productions, such as his touring art exhibit, The World of Tim Burton, when she is not absorbed in the publishing business or shooting stills for films. Several magazines and newspapers have published her portraits, including the New York Times, Los Angeles Times, Parade, Empire, and Entertainment Weekly. Gallo previously worked on the award-winning documentary Arrow Rock: Where the Past Is the Future, where he edited and contributed photographs and text.