Austin is a main character in The Backyardigans. He is depicted as a timid yet fun-loving kangaroo.
Austin is tall and his entire body is purple. He has a light blue shirt with a yellow line in the middle. He wears blue pants that are rolled up. His nose is dark purple and his eyebrows are dark purple. He has long ears with dark centers on the top of his head. Austin has a tail which comes out of the center of the seat of his shorts and trails on the ground.
Austin has appeared in many episodes of The Backyardigans. Unlike the other four main characters, he did not appear in the live-action pilot Me and My Friends or in the unaired animated pilot. His first appearance was in Pirate Treasure and his final appearance was in Nickelodeon's Mega Music Fest.
Austin has appeared in every single episode of this series, making him the main protagonist. He has three younger siblings, Victor, Jordan, and Dante, and a pet dog, Sparky. He is best friends with Jordan. He developed from his timidness from the original series to showing great leadership.