Julian is well known to Game of Thrones fans as Grand Maester Pycelle.
The event takes place at Olympia London 26-28 July and Julian will be appearing on the Sunday.
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Julian has certainly had a long and varied career, so it’s hard to pick just a few stand out roles to highlight. Here are a few of them: Count Scarlioni from Doctor Who City of Death serial, General Veers from Empire Strikes Back, Kristatos in James Bond: For Your Eyes Only, and Brian Harcourt-Smith in The Fourth Protocol. And of course there was Walter Donovan in Indiana Jones and the Last Crusade, and King Gustav in King Ralph.
Julian also provided the voice of Aragog the giant spider in Harry Potter and the Chamber of Secrets.
Julian joins joins previously announced guests David Roach, Peter Serafinowicz, Katie Purvis, Jessica Henwick, Paul Blake, Will Sliney, Jason Isaacs, Michael Carter, Billy Dee Williams, Corey Dee Williams and Ian Whyte.
Fantha Tracks will be at the event, so stay tuned as the guest list develops.