Dan Brown's bestselling Robert Langdon novel series has spawned multiple on-screen adaptations, anchored by Ron Howard's billion-dollar film trilogy – spanning The Da Vinci Code, Angels & Demons, and Inferno – starring Tom Hanks as the Harvard professor and world-renowned symbologist. The franchise later transitioned to television with the 2021 prequel series Dan Brown's The Lost Symbol, which cast Ashley Zukerman as a younger version of Langdon. He's the perfect fit for Robert Langdon — a brilliant academic whose curiosity, intelligence, and intellect are the tools of his trade." Published in 2025, The Secret of Secrets is the sixth novel in Brown's globe-trotting saga. Whether this casting rumor holds true or not, the series is shaping up to be an unmissable chapter for fans of the thrilling franchise.