The four members are the great-grandchildren of Captain Von Trapp, whose true story inspired the hit musical "The Sound of Music."

The Sound of Music has remained a film favorite in South Korea since its introduction here in the late 1960s. The movie's combination of scenic landscapes, compelling story and of course, heavenly musical score continues to attract audiences of all ages.

The group has toured the United States and Europe to spread the Von Trapp musical legacy that has entertained millions around the world for generations.

Sofia, 15, is an alto, Melanie, 14, is a soprano, Amanda, 12, is an alto, and Justin, 9, is a treble.