The Band Perry will take the stage for a special performance next month, to honor one of their own musical heroes. The sibling trio will perform at a benefit screening of the documentary, 'Glen Campbell ... I'll Be Me,' on Oct. 19, with proceeds benefiting Alzheimer's awareness.

The documentary, which opens in theaters on Oct. 24, covers Campbell's legendary career, his devastating diagnosis with Alzheimer's and his struggles with dementia, culminating with a 151-show farewell tour. Several celebrities appear in the film, including the Band Perry, Brad PaisleyVince GillSheryl CrowKeith Urban, Paul McCartney, Jay Leno, Bill Clinton and others.

'Glen Campbell ... I'll Be Me' took home the prestigious Gibson Music City / Music City Films Grand Jury Prize when it premiered at the Nashville Film Festival earlier this year.

“['Glen Campbell...I'll Be Me' is] an intimate and honest portrayal of a music legend’s battle with Alzheimer’s,” the judges said of the award. “‘Glen Campbell … I’ll Be Me’ captures a family’s commitment to love and laugh through the adversity of a debilitating disease.”

The Band Perry honored the country music icon with a performance at the 2012 Grammy Awards ceremony. They also appear on the five-song soundtrack for the movie, which is now available.

The Band Perry will be joined by Campbell's daughter, Ashley Campbell (who also appears on the EP), along with Delta Rae. The event will be held on Oct. 19 at the Music City Center in Nashville, Tenn. Tickets begin at $95 and are on sale now.