The daughter of British actor John Mills and playwright Mary Hayley Bell, Hayley Catherine Rose Vivien Mills made her first screen appearance as an infant in 1947's So Well Remembered. It wasn't until a decade later, however, that Hayley Mills made her formal film debut, portraying the preteen…
Mr. Murg: Why must you bedevil this poor dying woman with your childish silly little story?
Pollyanna: I just thought she could play the game! [to Mrs. Snow] You could be glad you don't need this horrid old coffin! You could help others, by making the patch-work quilt for the orphans if you wanted. You ought to forget about dying and be glad you're living!