Who is the lady with white hair in Tim Alice Wonderland?

You're likely referring to The White Queen, played by Anne Hathaway in the 2010 film "Alice in Wonderland" directed by Tim Burton.

She is not a traditional character from the original story, but a character created by Burton for the film. She represents the balance between the White Rabbit's organized and controlled world and the Red Queen's chaotic and oppressive reign.

Let me know if you have any other questions!