Dinah is Alice’s adorable little pet kitten. She has appeared in "Alice's Adventures in Wonderland" and in Disney's "Alice in Wonderland" where she was voiced by Mel Blanc and Kingdom Hearts. In the book, Dinah appears in the first four chapters. She is not physically present, but Alice talks to her many times, and mentions her frequently to Wonderland residents. When Alice describes Dinah's hunting skills to the animals in the Caucus Race, they become very uncomfortable.

In the film, Dinah is first seen sitting with Alice on a tree and listening to Alice's older sister reading from a history book. Both Dinah and Alice spot a white rabbit wearing a waistcoat and trousers and carrying a pocket watch running by. Wanting to find out where the rabbit is going, they chase after him. Soon after that Alice falls down the rabbit hole and waves goodbye to Dinah who almost falls down the rabbit hole as well. Dinah is finally seen again in the end of the movie where Alice and Dinah wake up from the strange Wonderland dream and goes home for tea with Dinah and her older sister.

More Info: aliceinwonderland.wikia.com