Buckminster (simply known as Buck) is a character in the Ice Age films. He is the major protagonist of the third film, a minor character in the fourth film, a supporting protagonist in the fifth film and the main protagonist in his upcoming own spin-off Disney+ series. He is Rudy's former arch-rival. He is a weasel that lives in an underground dinosaur world when he fell into it, many years ago. He lost one of his eyes in a past encounter to Rudy, but survived and swears revenge. He is also the main protagonist of the Ice Age: Dawn of The Dinosaurs video game. To many people, he was a scene-stealer in the movie and many fans wished for him to get his own movie.