Last updated on: 02/11/19 The Unbirthday Song (Song) First Appeared In: Alice in Wonderland Written By: Mack David; Al Hoffman and Jerry Livingston Performed By: Kathryn Beaumont; Ed Wynn; Jerry Colonna; and Jimmy MacDonald Debut: 1951 Disney Category: Disney Music Disney Character(s) in this Post:Mad Hatter (Alice in Wonderland) Related Articles: A Complete Rundown of Epcot Changes from 2019-2022 10 Things You Should Be Excited For At Walt Disney World in 2022 The Main Benefits of Genie Plus at Walt Disney World (yes, there are a few) 2022 Epcot Flower and Garden Festival Details | Disney World Resources Disney World Comes to Minecraft! Related Disney Items and TopicsBr’er Fox Plush (Medium) | Splash MountainBr’er Bear Plush (Medium) | Splash MountainSplash Mountain Funko Pop! Vinyl Figure SetMickey Mouse Mixed-Up Adventure (Disney Junior)Frozen 2 Singing Elsa Doll with Music | Disney Toys