Has it really been 50 years since the von Trapp family do-re-mi'd right into our hearts?
A college student attending San Fernando Valley State College, Carr had no idea her life would change with one audition — all because a friend sent her picture to producer Robert Wise. The unknown actress beat out big names like Mia Farrow, Sharon Tate, and Geraldine Chaplin for the role of the eldest von Trapp sister, kind and caring 16-year-old Liesl.
Since The Sound of Music, Carr left the show business for the most part, but recently appeared in Mad Men and has cropped up at reunions with her fellow von Trapp family alums.
Though he was just 15 when he played the eldest son, Friedrich Von Trapp, Hammond was one of the most experienced actors on set, having already appeared in Lord of the Flies and on Broadway.
After playing Friedrich, Hammond went on to portray superhero Peter Parker — a.k.a. Spider-Man — in The Amazing Spider-Man during the late '70s. He maintains strong friendships with all of his fellow von Trapp siblings, calling them his "best friends in the world." How sweet is that?
Louisa, one of the middle von Trapp sisters, was played by 16-year-old Heather Menzies, a relatively unknown-till-then Canadian-American actress.
Post-Sound of Music, Menzies continued acting and enjoyed some success in the industry, turning up in several films throughout the '60s and '70s including How Sweet It Is!, The Computer Wore Tennis Shoes, and Piranha. She also popped up on TV in the '80s, appearing on cop drama T.J. Hooker.
The youngest son, Kurt, was portrayed by 15-year-old Duane Chase, who went on to join the United States Forest Service shortly after the film was released.
Since his days singing a falsetto "good-bye" to a room full of partygoers, Chase took a totally different career route. Now, he's designing computer software, but he has made occasional appearances with his cast mates.
Little Angela Cartwright starred as the delightfully honest Brigitta von Trapp, a.k.a. the fifth child in the family. She was just 13 when The Sound of Music premiered, but had already appeared in several films and television shows by the time she was cast.
Cartwright went on to appear in numerous television shows, including Lost In Space during the late '60s. The sci-fi show was eventually turned into a film 30 years later, which Cartwright made a cameo in.
At 9 years old, child actress Debbie Turner played Marta, the second-youngest child in the von Trapp family.
After the film premiere in 1965, Turner opted to exit the entertainment industry and instead complete her education. She became an interior designer and, eventually, an event planner, founding her own floral and event design company. In 2010, she appeared on The Oprah Winfrey Show for the 45th anniversary of the movie.
Gretl, the totally adorable and youngest von Trapp kid, was played by seven-year-old Kym Karath. Don't let her age fool you — she wasn't inexperienced in the industry. At just 3, Karath started her career in Spencer's Mountain, starring Henry Fonda and Veronica Cartwright. Interestingly, Cartwright's young sister Angela played Brigitta von Trapp alongside Karath.
Since playing young Gretl, Karath went on to appear in several big-name television series, including The Brady Bunch, All My Children, and even in an episode of Lost In Space — the same show castmate Angela Cartwright later starred in.