He is forced by Grundel to help him to find Thumbelina. Carol Channing as Ms. Fieldmouse, a rather greedy yet kind field mouse who takes Thumbelina in from the cold and persuades her to marry Mr. Mole. John Hurt as Mr. Mole, a fabulously wealthy but self-involved and cynical mole who falls in love with Thumbelina after hearing her voice. Barbara Cook as Thumbelina's Mother, the kind widow who mothers Thumbelina since her birth from a flower. Charo as Mrs. Toad, a gorgeous and famous Spanish singer and mother to her three sons Mozo, Gringo, and Grundel. Kenneth Mars as King Colbert, Cornelius' father. June Foray as Queen Tabitha, Cornelius' mother. Will Ryan as Hero Dog, Reverend Rat. Additionally, Ryan voiced multiple background characters, including several beetles, barnyard animals, and other various insects. Danny Mann as Mozo, Grundel's younger brother. Loren Lester as Gringo, Grundel's younger brother. Pat Musick as Mrs. Rabbit Neil Ross as Mr. Bear, Mr. Fox Tawny Sunshine Glover as Gnatty, one of the jitterbugs. Michael Nunes as Li'l Bee, one of the jitterbugs. Kendall Cunningham as Baby Bug, one of the jitterbugs. Tony Jay (uncredited) as a bull on the farm of Thumbelina's mother. Music Barry Manilow agreed to compose the songs for three Don Bluth pictures. Thumbelina was the first, followed by The Pebble and the Penguin, and the third, a retelling of the story of Rapunzel, in which Manilow would also have a voice role, was canceled. The film's soundtrack was released for a limited time and has since gone out of print. "Marry the Mole" won a Razzie for Worst Original Song. Production and release Thumbelina was in production from February 1991 to May 1993 at Don Bluth Ireland Ltd. (formerly known as Sullivan Bluth Studios at that time) in Dublin, Ireland, even though principal recording and animation would not begin until early 1992. The film was completed with funds from filmmaker John Boorman and Hong Kong-based Media Assets after Don Bluth Entertainment filed for bankruptcy. It was originally scheduled to be distributed by Metro-Goldwyn-Mayer in North America and J&M Entertainment overseas, and was also originally slated for a Thanksgiving 1993 release in the United States. However, by the time it was completed, both companies dropped the arrangement due to concerns about the bankruptcy of Bluth's studio. During Sullivan Bluth's bankruptcy proceedings, the court trustee presented the film to Disney's film distribution unit,