Sisters Adelaide Treadwell,9, and Mirabella Treadwell, 9. (Spencer Weiner / Los Angeles Times)
Dave Lowdermilk, 45, and daughter Isabella, 7, are in the Austrian spirit. (Spencer Weiner / Los Angeles Times)
Malinda Howard wore her grandmother’s outfit, circa 1940, to look like the Baroness. (Spencer Weiner / Los Angeles Times)
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Cousins Stephanie Serra, 20, and Annie Serra, 22, are ready to play. (Spencer Weiner / Los Angeles Times)
Sophie Shin, 6, is ready for a drink with jam and bread. (Spencer Weiner / Los Angeles Times)
Julie Hendrickson, 44, and Mark Freytag, 35, as Maria and Capt. Von Trapp. (Spencer Weiner / Los Angeles Times)
Gretchen Kaessinger,7, left, Katie Kaessinger,10, Aine Dwane,10, and Nora Ward,10, enjoy a night out from the convent. (Spencer Weiner / Los Angeles Times)
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Jacob Zeelander,4, left, Zoe Zeelander,7, Canela Roey, 7, and Elica Roey, 4. (Spencer Weiner / Los Angeles Times)
The McIntoshes, Steve, left, Vicki and daughter, Annamarie, 7, make it a family affair. (Spencer Weiner / Los Angeles Times)
Steven Burns, 39, is ready to help the hills come alive. (Spencer Weiner / Los Angeles Times)
But the hills are already alive for Katherine Arroyo, 27, and Lecia Doss, 30. (Spencer Weiner / Los Angeles Times)
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Leanne Choi, 23, is one little girl in a pale pink coat. (Spencer Weiner / Los Angeles Times)
“The Sound of Music” fits Ella Shin, 4, to a T. (Spencer Weiner / Los Angeles Times)
Melissa Peterman was the host for the fifth year but donned a costume for the first time. (Spencer Weiner / Los Angeles Times)
Jager Wyss, 5, with mom, Wendy Hunter, pulling the strings. (Spencer Weiner / Los Angeles Times)
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Taylor Boyd, 10, was in the proper “Sound of Music” spirit. (Spencer Weiner / Los Angeles Times)
Gunning to win the

Clockwise from top left, Anthony O’Carroll, 42, Robyn Field, 45, Kate O’Carroll, 8, and Ibby O’Carroll, 10. (Spencer Weiner / Los Angeles Times)