 Strallen has appeared on a number of audio books down the years.One of her first, as a child, was as Matilda Wormwood in an audio dramatisation of Roald Dahl's "Matilda" in 1990, released on audio cassette as part of the Roald Dahl Theatre Collection, dramatising a selection of the author's most popular children's books.She also appears in plays for BBC Radio 4.