Rebecca Hall Officially Joins Netflix Series Based On Dan Brown Novel ‘The Secret Of Secrets’

EXCLUSIVE: Rebecca Hall (The Beauty, The Listeners) has officially been cast as the female lead, Katherine Solomon, on the untitled new Netflix series based on the world of Dan Brown’s novel The Secret of Secrets. She will star opposite her husband, Morgan Spector, who will play the character Robert Langdon. Deadline first revealed Hall was in talks to join the series earlier this month. In the 2025 novel, symbologist Robert Langdon races against ancient forces and time to rescue a missing scientist and her groundbreaking manuscript whose discoveries have the power to forever change humanity’s understanding of the mind. Katherine is a scientist and Langdon’s girlfriend in the book. The series adaptation from Brown and Carlton Cuse “will blend futuristic science with mystical lore, delivering on the heart-pounding suspense and international intrigue that has made the Langdon stories a global phenomenon,” the streamer touted. Watch on Deadline Cuse and Brown are co-creators and executive producers of the series adaptation, with the former also serving as writer and showrunner. Emma Forman of Cuse’s Genre-Arts also executive produces the project with Zoe Robyn, which landed at Netflix in May 2025 with a straight-to-series order. The Secret of Secrets was published by Doubleday on September 9, 2025. Langdon has been featured in five previous books: Angels & Demons (2000), The Da Vinci Code (2003), The Lost Symbol (2009), Inferno (2013), and Origin (2017). Tom Hanks played Langdon in the film franchise by Ron Howard, which has grossed approximately $2.24 billion worldwide as of 2025. Hall is repped by Julian Belfrage Associates in London, WME, and attorney Gretchen Rush.