On September 12, 1997, Mandrell opened her own 1,400-seat theater, "The Louise Mandrell Theater" in Pigeon Forge, Tennessee, in the heart of the Smoky Mountains in Tennessee, alongside other theaters such as Lee Greenwood's. Mandrell appeared in every performance there and encompassed numerous musical styles, including country, jazz, and big band. It was considered the most attended (non-dinner) show in the Smoky Mountains. The Triumphant Quartet, formerly known as the "Integrity Quartet", was the in-house Southern gospel group and back-up singers for Louise. The Louise Mandrell Theater had its last performance, to a sold-out house, on December 31, 2005. Mandrell sold the theater afterwards and it has changed hands twice since. The theater is now home to the "Smoky Mountain Opry."