As anticipation mounts among fantasy fans ahead of the Radio 4/4 Extra co-production of Neil Gaiman's Neverwhere, RadioTimes.com can reveal the first exclusive shot of the star-studded cast, which reads like a who's who of cult TV and film.

Sherlock's Benedict Cumberbatch and X-Men's James McAvoy are joined by Game of Thrones and former Fades star Natalie Dormer, Doctor Who alumnus Sophie Okonedo and Homeland's David Harewood for the tale of London Below, an alternate reality beneath the capital where famous landmarks take on a life of their own.

Screen legends Christopher Lee and Bernard Cribbins also star in an adaptation that is being described as an "audio film".

The six-part series begins with an hour-long episode at 2:30pm on Saturday 16 March on Radio 4 and continues with five 30-minute instalments stripped across the week at 6pm on Radio 4 Extra from Monday 18 March.

More photos and news to follow in the coming weeks...