- For the recipient of the Victoria Cross, see John Hannah (VC)
- For the former NFL player, see John Hannah (NFL player)
He first came to the attention of cinema audiences in his role as Matthew in Four Weddings and a Funeral (1994). Since then he has appeared in the films Sliding Doors (1998), The Mummy (1999), Pandaemonium (2000), and The Mummy Returns (2001). He has also appeared in several television series, including the British series Rebus, based on the detective novels of Ian Rankin, and the U.S. series MDs (2002).