Blithe, blond, beaming, and beguiling, Canadian-born actress Heather Menzies was a precocious child star and a cult-movie heroine before becoming one of the sunnier luminaries on 1970s television. At just 14, she overcame limited experience and, on pure charisma, won the part of the daydreaming Louisa Von Trapp in the grandly sweeping, endlessly charming Julie Andrews classic "The Sound of Music" ('65). Although her performance immediately begot a handful of film roles and reunited her with Andrews in the exotic, star-studded missionary drama "Hawaii," she began to work more consistently on television, dabbling in recurring guest roles on such prime-time hits as "Dragnet 1967." The '70s, however, marked an advance into bolder territory-in addition to starring in such unabashed creature-feature exploitations as the celebrated Roger Corman creeper "Piranha" and the slithery, serpentine snake-fest "Sssssss," she shed her confining sweetheart image with a full-frontal pose in the hallowed pages of "Playboy." In 1975, she met and married burgeoning TV star Robert Urich, kicking off a classic power-couple scenario which saw the couple co-star on episodes of such popular series as the enjoyably glitzy mystery show "Vegas" ('79-'81) and the quintessential P.I. adventure "Spenser: For Hire" ('87). Menzies retired from show business in 1990 and remained married to Urich until a rare form of cancer took his life in 2002. She herself is an ovarian cancer surviver.