Behind the Scenes: Alice in Wonderland (1951)
Walt Disney was a big fan of live-action reference and nearly the entire movie would be filmed before being used to guide the artists through animating the movie with realism.
This is Kathryn Beaumont. She was 11 years old when she was chosen to play Alice. She later voiced the roles of both Wendy in 'Peter Pan' and Anita in '101 Dalmatians'.