Wil Cwac Cwac is a Welsh-language cartoon based on a series of children's books written in the 1920's by Jennie Thomas and J. O. Williams (including the famous Welsh-language book Llyfr Mawr y Plant). Only 20 episodes were shown on Children's ITV from 21 November 1984 to 18 December 1984. It was produced by Sirol Animation for S4C. Both book and cartoon series take place in rural Wales. All characters and narration were voiced by Myfanwy Talog, who also starred in Alias the Jester.