Iris later made her audio debut in Big Finish Productions' Excelis Dawns, where she was portrayed by Katy Manning. Manning would go on to play Iris in all future audio stories, and she would be the basis for illustrations of Iris on the cover of each Iris Wildthyme book.
In August2005, Big Finish released the prose anthology Wildthyme on Top as part of their New Worlds label. This was followed a few months later by Wildthyme at Large, the first Iris Wildthyme audio story, which notably introduced her companion Panda. Further anthologies of short stories and novellas featuring Iris were published by Obverse Books, and Paul Magrs wrote further novels featuring Iris and Panda for Snowbooks Ltd.