No guest star ever appeared twice on "The Muppet Show", although John Denver appeared both on the show and in two specials ("" and "John Denver & the Muppets: Rocky Mountain Holiday"), while Dudley Moore reappeared in the special, "The Muppets Go to the Movies". Additionally, several guest stars from the series had cameos in one of the first three Muppet theatrical films. Originally, the producers had to call on their personal contacts to appeal to them to appear, especially considering that doing so required an overseas trip to Britain. However, the situation changed when the renowned ballet dancer Rudolf Nureyev offered to appear; his performance on this unusual TV program produced so much favourable publicity that the series became one of the most sought after for various celebrities to appear in.