A film on the hit group Sister Sledge, the sisters (Kim, Debbie, Kathy and Joni Sledge) behind “We Are Family,” is in development to head to the big screen.

Kim Sledge is developing a feature film, Live Song, about “the rise to international stardom of the four musical sisters from Philadelphia.”

The sisters still perform as Sister Sledge. Joni Sledge died last year.

All of their hit songs are cleared for use in the film, which will be based on Kim’s upcoming memoirs. She told Variety, who broke the news, that she has the blessing of her family. The family will have input in the script and the casting as both come together.

Per Variety, “The film will cover the band’s experiences rubbing shoulders with musical greats such as James Brown, Stevie Wonder, The Jackson 5 and Elton John. It will also take in the wider changes in U.S. society during the group’s ascendancy.

“Music will be a great part of it, because that’s what our lives have been about. During some of the most politically transitional moments in history, we were there,” said Sledge.

Lou Weisbach, a longtime associate of the Sledge family and the chief of licensing business Merch Time, is overseeing the film’s development. Weisbach said that the film will be “a journey through a century of accomplishment – a great American story.”