THEN: Heather Menzies as 'Louisa von Trapp'
Louisa von Trapp, the third oldest child, is often found by the side of her younger sister Brigitta. The 13-year-old also likes to play pranks on the family governesses, including putting spiders in their beds and pretending to be one of her sisters. —XFINITY Entertainment Staff (Photo by 20th Century Fox)
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