Austin is a purple kangaroo and a major character in The Backyardigans.
Austin is described as the "new kangaroo on the block," and he does not know the other characters very well yet. He is somewhat hesitant to express his opinions, and slow to take the lead. When he overcomes his shy feelings, Austin gets the respect he deserves. He is revealed to be sweet and intelligent as the series progresses. Throughout his adventures, he frequently takes the role of a humble servant or faithful assistant, putting his friends' needs ahead of his own and helping them in any way he can. He is not one to ask for recognition, but even so, he receives a lot of love and support from his friends for all that he does for them.
Austin lives in an purple-colored house to the right of Uniqua's home. It is separated from the other characters' houses by a wooden fence. When the characters visit Austin's house for a snack, they use a door within the fence to enter Austin's front yard.
Austin has purple skin and long ears. His nose and eyebrows are a darker shade of purple. Austin has a tail which comes out of the seat of his shorts and trails on the ground. He wears a light blue shirt with a yellow stripe across the middle. He wears rolled-up blue pants.
Austin appears the least out of the five main characters in The Backyardigans. He was not present for the two pilots and debuted in "Pirate Treasure". His last appearance in an episode of The Backyardigans was in "The Tale of the Not-So-Nice Dragon". His last appearance in any aired animation was in Nickelodeon's Mega Music Fest 2010.