The funeral comes after several days of public viewings for the singer, which began with two days at Detroit's Charles H. Wright Museum of African American History that attracted thousands of fans and mourners from around the country.
Her invitation-only funeral is taking place at Greater Grace Temple, one of the largest and most famous churches in the city.
The formal part of the service is to begin at 1400 GMT (10 am local time) in her MI hometown. She'll then be laid to rest at Woodlawn Cemetery.
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Organizers of Aretha Franklin's funeral insist it will be a spirit-filled service, not a show.
Speakers and guests at the funeral will include former US President Bill Clinton, Stevie Wonder, Smokey Robinson, civil rights leaders Jesse Jackson and Al Sharpton and record producer Clive Davis. Among the gospel stars performing will be Marvin Sapp and Vanessa Bell Armstrong. However, a public ceremony was supposed to start at 10 a.m. immediately afterward so that her devoted fans can participate, as well. Watch it on fox5atlanta.com starting with special coverage at 9 a.m. He said they "talked all the time", the last just a couple weeks before she became too ill to speak."We saw all of our other close friends go", Robinson said.
TMZ caught up with the "I'm Every Woman" belter at the airport on her way to Detroit from Los Angeles. The services were also expected to be "unapologetically Black", Georgetown University professor Micheal Eric Dyson, who is from Detroit, told the Associated Press.