Siân Phillips (Mrs. Pugh) is the only member of the cast who also appeared in the big screen version of this movie, Under Milk Wood (1971), where she can be seen in the role of Mrs. Ogmore-Pritchard, the part played by Charlotte Church in this movie.
Charlotte Church appears both in this and in another adaptation released the following year, Under Milk Wood (2015), where she plays Polly Garter.