Roo is a fictional character created in 1926 by A. A. Milne and first featured in the book Winnie–the–Pooh. He is a young kangaroo and his mother is Kanga. Like most other Pooh characters, Roo is based on a stuffed toy animal that belonged to Milne's son, Christopher Robin Milne, though stuffed Roo was lost a long time ago.
Roo participates in the adventures of a teddy bear called Winnie–the–Pooh and his friends Piglet, a small toy pig; Eeyore, a toy donkey; Owl, a live owl; Rabbit, a live rabbit; and Christopher Robin, a human boy. Roo is introduced in the chapter entitled "In Which Kanga and Baby Roo Come to the Forest and Piglet has a Bath." Roo's friend Tigger does not appear until the sequel, The House at Pooh Corner. The character Roo would subsequently appear in various cartoons and other adaptations.