This (usually) blonde, warm actress has often played older than she is, most particularly as Norma Arnold, the "everything will be okay" mother of three, on the hit ABC sitcom "The Wonder Years" (1988-93). Alley Mills may also be recalled as the champion-of-the-oppressed young attorney Leslie Dunn on "The Associates" (ABC, 1979-80), a heralded but short-lived ensemble sitcom.Mills, the daughter of TV executive Ted Mills, was only eight years old when she made her TV debut on "The Patti Page Show". After a hiatus for schooling, she landed her first film role, one scene opposite Frank Langella