Donna Summer -- Private Funeral Service Set for Tomorrow

As we reported, "Disco Queen" Donna Summer will be laid to rest Wednesday during a private ceremony at a church in Nashville, TN.

We're told the church is expecting a capacity crowd -- roughly 1,000 people -- but the service is invitation only.

The family is adamant ... they don't want the ceremony to become a media spectacle and they've put together a strict guest list consisting of close friends and family members.

It's unclear if any of Donna's famous friends will attend -- but we're told people are flying in from all over the country.

TMZ broke the story ... Donna passed away in Florida last week after battling lung cancer. She was 63.