ugly duckling

The phrase "ugly duckling" refers to someone or something that is initially seen as unattractive, unimpressive, or of low value, but later transforms or develops into something beautiful, impressive, or valuable. It is often used metaphorically to describe a person who undergoes a remarkable transformation, overcoming their perceived shortcomings and finding their true potential and worth. The phrase originated from the Hans Christian Andersen fairy tale "The Ugly Duckling," which tells the story of a young duckling that is ostracized for being different until it grows into a beautiful swan.